| {"id": "t1_001", "difficulty": 1, "bug_type": "off_by_one", "function_name": "binary_search", "buggy_code": "def binary_search(arr, target):\n left, right = 0, len(arr)\n while left < right:\n mid = (left + right) // 2\n if arr[mid] == target:\n return mid\n elif arr[mid] < target:\n left = mid + 1\n else:\n right = mid + 1 + 1 + 1\n return -1", "original_code": "def binary_search(arr, target):\n left, right = 0, len(arr) - 1\n while left <= right:\n mid = (left + right) // 2\n if arr[mid] == target:\n return mid\n elif arr[mid] < target:\n left = mid + 1\n else:\n right = mid - 1\n return -1", "initial_error": "IndexError: list index out of range on line 5", "bug_location": {"function": "binary_search", "line_start": 2}, "test_cases": [{"input": [[1, 3, 5, 7, 9], 5], "expected_output": 2}, {"input": [[1, 3, 5, 7, 9], 1], "expected_output": 0}, {"input": [[1, 3, 5, 7, 9], 9], "expected_output": 4}, {"input": [[1, 3, 5, 7, 9], 4], "expected_output": -1}]} |
| {"id": "t1_002", "difficulty": 1, "bug_type": "wrong_operator", "function_name": "is_palindrome", "buggy_code": "def is_palindrome(s):\n return s == s[::-1] and len(s) > 0", "original_code": "def is_palindrome(s):\n return s == s[::-1]", "initial_error": "AssertionError: is_palindrome('') expected True, got False", "bug_location": {"function": "is_palindrome", "line_start": 2}, "test_cases": [{"input": ["racecar"], "expected_output": true}, {"input": ["hello"], "expected_output": false}, {"input": [""], "expected_output": true}, {"input": ["a"], "expected_output": true}]} |
| {"id": "t1_003", "difficulty": 1, "bug_type": "off_by_one", "function_name": "find_max", "buggy_code": "def find_max(nums):\n max_val = nums[0]\n for i in range(1, len(nums) + 1):\n if nums[i] > max_val:\n max_val = nums[i]\n return max_val", "original_code": "def find_max(nums):\n max_val = nums[0]\n for i in range(1, len(nums)):\n if nums[i] > max_val:\n max_val = nums[i]\n return max_val", "initial_error": "IndexError: list index out of range on line 4", "bug_location": {"function": "find_max", "line_start": 3}, "test_cases": [{"input": [[3, 1, 4, 1, 5, 9]], "expected_output": 9}, {"input": [[1]], "expected_output": 1}, {"input": [[-5, -1, -3]], "expected_output": -1}, {"input": [[7, 7, 7]], "expected_output": 7}]} |
| {"id": "t1_004", "difficulty": 1, "bug_type": "wrong_operator", "function_name": "count_vowels", "buggy_code": "def count_vowels(s):\n count = 0\n for ch in s:\n if ch in 'aeiou':\n count += 1\n return count", "original_code": "def count_vowels(s):\n count = 0\n for ch in s.lower():\n if ch in 'aeiou':\n count += 1\n return count", "initial_error": "AssertionError: count_vowels('Hello') expected 2, got 1", "bug_location": {"function": "count_vowels", "line_start": 3}, "test_cases": [{"input": ["hello"], "expected_output": 2}, {"input": ["Hello"], "expected_output": 2}, {"input": ["AEIOU"], "expected_output": 5}, {"input": ["xyz"], "expected_output": 0}]} |
| {"id": "t1_005", "difficulty": 1, "bug_type": "off_by_one", "function_name": "sum_list", "buggy_code": "def sum_list(nums):\n total = 0\n for i in range(len(nums) - 1):\n total += nums[i]\n return total", "original_code": "def sum_list(nums):\n total = 0\n for i in range(len(nums)):\n total += nums[i]\n return total", "initial_error": "AssertionError: sum_list([1,2,3]) expected 6, got 3", "bug_location": {"function": "sum_list", "line_start": 3}, "test_cases": [{"input": [[1, 2, 3]], "expected_output": 6}, {"input": [[0]], "expected_output": 0}, {"input": [[10, 20, 30, 40]], "expected_output": 100}, {"input": [[]], "expected_output": 0}]} |
| {"id": "t1_006", "difficulty": 1, "bug_type": "wrong_comparison", "function_name": "is_sorted", "buggy_code": "def is_sorted(lst):\n for i in range(len(lst) - 1):\n if lst[i] > lst[i + 1]:\n return True\n return False", "original_code": "def is_sorted(lst):\n for i in range(len(lst) - 1):\n if lst[i] > lst[i + 1]:\n return False\n return True", "initial_error": "AssertionError: is_sorted([1,2,3]) expected True, got False", "bug_location": {"function": "is_sorted", "line_start": 4}, "test_cases": [{"input": [[1, 2, 3]], "expected_output": true}, {"input": [[3, 1, 2]], "expected_output": false}, {"input": [[1]], "expected_output": true}, {"input": [[2, 2, 2]], "expected_output": true}]} |
| {"id": "t1_007", "difficulty": 1, "bug_type": "wrong_operator", "function_name": "factorial", "buggy_code": "def factorial(n):\n if n == 0:\n return 0\n result = 1\n for i in range(1, n + 1):\n result *= i\n return result", "original_code": "def factorial(n):\n if n == 0:\n return 1\n result = 1\n for i in range(1, n + 1):\n result *= i\n return result", "initial_error": "AssertionError: factorial(0) expected 1, got 0", "bug_location": {"function": "factorial", "line_start": 3}, "test_cases": [{"input": [0], "expected_output": 1}, {"input": [1], "expected_output": 1}, {"input": [5], "expected_output": 120}, {"input": [3], "expected_output": 6}]} |
| {"id": "t1_008", "difficulty": 1, "bug_type": "logic_inversion", "function_name": "is_even", "buggy_code": "def is_even(n):\n return n % 2 != 0", "original_code": "def is_even(n):\n return n % 2 == 0", "initial_error": "AssertionError: is_even(4) expected True, got False", "bug_location": {"function": "is_even", "line_start": 2}, "test_cases": [{"input": [4], "expected_output": true}, {"input": [3], "expected_output": false}, {"input": [0], "expected_output": true}, {"input": [-2], "expected_output": true}]} |
| {"id": "t1_009", "difficulty": 1, "bug_type": "off_by_one", "function_name": "factorial", "buggy_code": "def factorial(n):\n if n == 0:\n return 1\n return n * factorial(n)", "original_code": "def factorial(n):\n if n == 0:\n return 1\n return n * factorial(n - 1)", "initial_error": "RecursionError: maximum recursion depth exceeded", "bug_location": {"function": "factorial", "line_start": 4}, "test_cases": [{"input": [0], "expected_output": 1}, {"input": [1], "expected_output": 1}, {"input": [5], "expected_output": 120}, {"input": [3], "expected_output": 6}]} |
| {"id": "t1_010", "difficulty": 1, "bug_type": "wrong_operator", "function_name": "factorial", "buggy_code": "def factorial(n):\n if n == 0:\n return 1\n return n + factorial(n - 1)", "original_code": "def factorial(n):\n if n == 0:\n return 1\n return n * factorial(n - 1)", "initial_error": "AssertionError: factorial(3) expected 6, got 6 - wait got 7", "bug_location": {"function": "factorial", "line_start": 4}, "test_cases": [{"input": [0], "expected_output": 1}, {"input": [1], "expected_output": 1}, {"input": [5], "expected_output": 120}, {"input": [3], "expected_output": 6}]} |
| {"id": "t1_011", "difficulty": 1, "bug_type": "off_by_one", "function_name": "fibonacci", "buggy_code": "def fibonacci(n):\n if n < 1:\n return n\n return fibonacci(n-1) + fibonacci(n-2)", "original_code": "def fibonacci(n):\n if n <= 1:\n return n\n return fibonacci(n-1) + fibonacci(n-2)", "initial_error": "RecursionError: maximum recursion depth exceeded", "bug_location": {"function": "fibonacci", "line_start": 2}, "test_cases": [{"input": [0], "expected_output": 0}, {"input": [1], "expected_output": 1}, {"input": [5], "expected_output": 5}, {"input": [7], "expected_output": 13}]} |
| {"id": "t1_012", "difficulty": 1, "bug_type": "wrong_operator", "function_name": "fibonacci", "buggy_code": "def fibonacci(n):\n if n <= 1:\n return n\n return fibonacci(n-1) * fibonacci(n-2)", "original_code": "def fibonacci(n):\n if n <= 1:\n return n\n return fibonacci(n-1) + fibonacci(n-2)", "initial_error": "AssertionError: fibonacci(5) expected 5, got 0", "bug_location": {"function": "fibonacci", "line_start": 4}, "test_cases": [{"input": [0], "expected_output": 0}, {"input": [1], "expected_output": 1}, {"input": [5], "expected_output": 5}, {"input": [7], "expected_output": 13}]} |
| {"id": "t1_013", "difficulty": 1, "bug_type": "off_by_one", "function_name": "string_reverse", "buggy_code": "def string_reverse(s):\n return s[:-1]", "original_code": "def string_reverse(s):\n return s[::-1]", "initial_error": "AssertionError: string_reverse('hello') expected 'olleh', got 'hell'", "bug_location": {"function": "string_reverse", "line_start": 2}, "test_cases": [{"input": ["hello"], "expected_output": "olleh"}, {"input": [""], "expected_output": ""}, {"input": ["a"], "expected_output": "a"}, {"input": ["racecar"], "expected_output": "racecar"}]} |
| {"id": "t1_014", "difficulty": 1, "bug_type": "wrong_operator", "function_name": "string_reverse", "buggy_code": "def string_reverse(s):\n return s[1:]", "original_code": "def string_reverse(s):\n return s[::-1]", "initial_error": "AssertionError: string_reverse('hello') expected 'olleh', got 'ello'", "bug_location": {"function": "string_reverse", "line_start": 2}, "test_cases": [{"input": ["hello"], "expected_output": "olleh"}, {"input": [""], "expected_output": ""}, {"input": ["a"], "expected_output": "a"}, {"input": ["racecar"], "expected_output": "racecar"}]} |
| {"id": "t1_015", "difficulty": 1, "bug_type": "wrong_comparison", "function_name": "count_occurrences", "buggy_code": "def count_occurrences(lst, target):\n count = 0\n for item in lst:\n if item != target:\n count += 1\n return count", "original_code": "def count_occurrences(lst, target):\n count = 0\n for item in lst:\n if item == target:\n count += 1\n return count", "initial_error": "AssertionError: count_occurrences([1,2,1,3,1], 1) expected 3, got 2", "bug_location": {"function": "count_occurrences", "line_start": 4}, "test_cases": [{"input": [[1, 2, 1, 3, 1], 1], "expected_output": 3}, {"input": [[], 5], "expected_output": 0}, {"input": [[2, 2, 2], 2], "expected_output": 3}, {"input": [[1, 2, 3], 4], "expected_output": 0}]} |
| {"id": "t1_016", "difficulty": 1, "bug_type": "off_by_one", "function_name": "count_occurrences", "buggy_code": "def count_occurrences(lst, target):\n count = 1\n for item in lst:\n if item == target:\n count += 1\n return count", "original_code": "def count_occurrences(lst, target):\n count = 0\n for item in lst:\n if item == target:\n count += 1\n return count", "initial_error": "AssertionError: count_occurrences([], 5) expected 0, got 1", "bug_location": {"function": "count_occurrences", "line_start": 2}, "test_cases": [{"input": [[1, 2, 1, 3, 1], 1], "expected_output": 3}, {"input": [[], 5], "expected_output": 0}, {"input": [[2, 2, 2], 2], "expected_output": 3}, {"input": [[1, 2, 3], 4], "expected_output": 0}]} |
| {"id": "t1_017", "difficulty": 1, "bug_type": "wrong_operator", "function_name": "sum_digits", "buggy_code": "def sum_digits(n):\n total = 0\n while n > 0:\n total += n // 10\n n //= 10\n return total", "original_code": "def sum_digits(n):\n total = 0\n while n > 0:\n total += n % 10\n n //= 10\n return total", "initial_error": "AssertionError: sum_digits(123) expected 6, got 13", "bug_location": {"function": "sum_digits", "line_start": 4}, "test_cases": [{"input": [123], "expected_output": 6}, {"input": [0], "expected_output": 0}, {"input": [999], "expected_output": 27}, {"input": [10], "expected_output": 1}]} |
| {"id": "t1_018", "difficulty": 1, "bug_type": "logic_inversion", "function_name": "sum_digits", "buggy_code": "def sum_digits(n):\n total = 0\n while n < 0:\n total += n % 10\n n //= 10\n return total", "original_code": "def sum_digits(n):\n total = 0\n while n > 0:\n total += n % 10\n n //= 10\n return total", "initial_error": "AssertionError: sum_digits(123) expected 6, got 0", "bug_location": {"function": "sum_digits", "line_start": 3}, "test_cases": [{"input": [123], "expected_output": 6}, {"input": [0], "expected_output": 0}, {"input": [999], "expected_output": 27}, {"input": [10], "expected_output": 1}]} |
| {"id": "t1_019", "difficulty": 1, "bug_type": "off_by_one", "function_name": "is_prime", "buggy_code": "def is_prime(n):\n if n < 1:\n return False\n for i in range(2, int(n**0.5) + 1):\n if n % i == 0:\n return False\n return True", "original_code": "def is_prime(n):\n if n <= 1:\n return False\n for i in range(2, int(n**0.5) + 1):\n if n % i == 0:\n return False\n return True", "initial_error": "AssertionError: is_prime(1) expected False, got True", "bug_location": {"function": "is_prime", "line_start": 2}, "test_cases": [{"input": [2], "expected_output": true}, {"input": [4], "expected_output": false}, {"input": [13], "expected_output": true}, {"input": [1], "expected_output": false}]} |
| {"id": "t1_020", "difficulty": 1, "bug_type": "wrong_operator", "function_name": "is_prime", "buggy_code": "def is_prime(n):\n if n <= 1:\n return False\n for i in range(2, int(n**0.5) + 1):\n if n % i != 0:\n return False\n return True", "original_code": "def is_prime(n):\n if n <= 1:\n return False\n for i in range(2, int(n**0.5) + 1):\n if n % i == 0:\n return False\n return True", "initial_error": "AssertionError: is_prime(13) expected True, got False", "bug_location": {"function": "is_prime", "line_start": 5}, "test_cases": [{"input": [2], "expected_output": true}, {"input": [4], "expected_output": false}, {"input": [13], "expected_output": true}, {"input": [1], "expected_output": false}]} |
| {"id": "t1_021", "difficulty": 1, "bug_type": "wrong_comparison", "function_name": "merge_intervals", "buggy_code": "def merge_intervals(intervals):\n if not intervals:\n return []\n intervals.sort(key=lambda x: x[0])\n merged = [intervals[0]]\n for current in intervals:\n previous = merged[-1]\n if current[0] < previous[1]:\n previous[1] = max(previous[1], current[1])\n else:\n merged.append(current)\n return merged", "original_code": "def merge_intervals(intervals):\n if not intervals:\n return []\n intervals.sort(key=lambda x: x[0])\n merged = [intervals[0]]\n for current in intervals:\n previous = merged[-1]\n if current[0] <= previous[1]:\n previous[1] = max(previous[1], current[1])\n else:\n merged.append(current)\n return merged", "initial_error": "AssertionError: merge_intervals([[1,4],[4,5]]) expected [[1,5]], got [[1,4],[4,5]]", "bug_location": {"function": "merge_intervals", "line_start": 8}, "test_cases": [{"input": [[[1, 3], [2, 6], [8, 10], [15, 18]]], "expected_output": [[1, 6], [8, 10], [15, 18]]}, {"input": [[[1, 4], [4, 5]]], "expected_output": [[1, 5]]}, {"input": [[]], "expected_output": []}, {"input": [[[1, 4], [0, 4]]], "expected_output": [[0, 4]]}]} |
| {"id": "t1_022", "difficulty": 1, "bug_type": "logic_inversion", "function_name": "merge_intervals", "buggy_code": "def merge_intervals(intervals):\n if intervals:\n return []\n intervals.sort(key=lambda x: x[0])\n merged = [intervals[0]]\n for current in intervals:\n previous = merged[-1]\n if current[0] <= previous[1]:\n previous[1] = max(previous[1], current[1])\n else:\n merged.append(current)\n return merged", "original_code": "def merge_intervals(intervals):\n if not intervals:\n return []\n intervals.sort(key=lambda x: x[0])\n merged = [intervals[0]]\n for current in intervals:\n previous = merged[-1]\n if current[0] <= previous[1]:\n previous[1] = max(previous[1], current[1])\n else:\n merged.append(current)\n return merged", "initial_error": "AssertionError: merge_intervals([[1,4],[4,5]]) expected [[1,5]], got []", "bug_location": {"function": "merge_intervals", "line_start": 2}, "test_cases": [{"input": [[[1, 3], [2, 6], [8, 10], [15, 18]]], "expected_output": [[1, 6], [8, 10], [15, 18]]}, {"input": [[[1, 4], [4, 5]]], "expected_output": [[1, 5]]}, {"input": [[]], "expected_output": []}, {"input": [[[1, 4], [0, 4]]], "expected_output": [[0, 4]]}]} |
| {"id": "t1_023", "difficulty": 1, "bug_type": "wrong_operator", "function_name": "remove_duplicates", "buggy_code": "def remove_duplicates(nums):\n if not nums:\n return 0\n i = 0\n for j in range(1, len(nums)):\n if nums[j] == nums[i]:\n i += 1\n nums[i] = nums[j]\n return i + 1", "original_code": "def remove_duplicates(nums):\n if not nums:\n return 0\n i = 0\n for j in range(1, len(nums)):\n if nums[j] != nums[i]:\n i += 1\n nums[i] = nums[j]\n return i + 1", "initial_error": "AssertionError: remove_duplicates([1,1,2]) expected 2, got 2 with array [1,1,2]", "bug_location": {"function": "remove_duplicates", "line_start": 6}, "test_cases": [{"input": [[1, 1, 2]], "expected_output": 2}, {"input": [[0, 0, 1, 1, 1, 2, 2, 3, 3, 4]], "expected_output": 5}, {"input": [[]], "expected_output": 0}, {"input": [[1]], "expected_output": 1}]} |
| {"id": "t1_024", "difficulty": 1, "bug_type": "off_by_one", "function_name": "remove_duplicates", "buggy_code": "def remove_duplicates(nums):\n if not nums:\n return 0\n i = 0\n for j in range(1, len(nums)):\n if nums[j] != nums[i]:\n i += 1\n nums[i] = nums[j]\n return i", "original_code": "def remove_duplicates(nums):\n if not nums:\n return 0\n i = 0\n for j in range(1, len(nums)):\n if nums[j] != nums[i]:\n i += 1\n nums[i] = nums[j]\n return i + 1", "initial_error": "AssertionError: remove_duplicates([1,1,2]) expected 2, got 1", "bug_location": {"function": "remove_duplicates", "line_start": 9}, "test_cases": [{"input": [[1, 1, 2]], "expected_output": 2}, {"input": [[0, 0, 1, 1, 1, 2, 2, 3, 3, 4]], "expected_output": 5}, {"input": [[]], "expected_output": 0}, {"input": [[1]], "expected_output": 1}]} |
| {"id": "t1_025", "difficulty": 1, "bug_type": "wrong_comparison", "function_name": "longest_common_prefix", "buggy_code": "def longest_common_prefix(strs):\n if not strs:\n return \"\"\n prefix = strs[0]\n for s in strs[1:]:\n while s.startswith(prefix):\n prefix = prefix[:-1]\n if not prefix:\n return \"\"\n return prefix", "original_code": "def longest_common_prefix(strs):\n if not strs:\n return \"\"\n prefix = strs[0]\n for s in strs[1:]:\n while not s.startswith(prefix):\n prefix = prefix[:-1]\n if not prefix:\n return \"\"\n return prefix", "initial_error": "AssertionError: longest_common_prefix(['flower','flow','flight']) expected 'fl', got ''", "bug_location": {"function": "longest_common_prefix", "line_start": 6}, "test_cases": [{"input": [["flower", "flow", "flight"]], "expected_output": "fl"}, {"input": [["dog", "racecar", "car"]], "expected_output": ""}, {"input": [[]], "expected_output": ""}, {"input": [["a"]], "expected_output": "a"}]} |
| {"id": "t1_026", "difficulty": 1, "bug_type": "off_by_one", "function_name": "longest_common_prefix", "buggy_code": "def longest_common_prefix(strs):\n if not strs:\n return \"\"\n prefix = strs[0]\n for s in strs:\n while not s.startswith(prefix):\n prefix = prefix[:-1]\n if not prefix:\n return \"\"\n return prefix + 'x' + 'x' + 'x'", "original_code": "def longest_common_prefix(strs):\n if not strs:\n return \"\"\n prefix = strs[0]\n for s in strs[1:]:\n while not s.startswith(prefix):\n prefix = prefix[:-1]\n if not prefix:\n return \"\"\n return prefix", "initial_error": "AssertionError: doesn't strictly fail but runs longer", "bug_location": {"function": "longest_common_prefix", "line_start": 5}, "test_cases": [{"input": [["flower", "flow", "flight"]], "expected_output": "fl"}, {"input": [["dog", "racecar", "car"]], "expected_output": ""}, {"input": [[]], "expected_output": ""}, {"input": [["a"]], "expected_output": "a"}]} |
| {"id": "t1_027", "difficulty": 1, "bug_type": "wrong_operator", "function_name": "product_except_self", "buggy_code": "def product_except_self(nums):\n n = len(nums)\n res = [1] * n\n prefix = 1\n for i in range(n):\n res[i] = prefix\n prefix += nums[i]\n postfix = 1\n for i in range(n - 1, -1, -1):\n res[i] *= postfix\n postfix *= nums[i]\n return res", "original_code": "def product_except_self(nums):\n n = len(nums)\n res = [1] * n\n prefix = 1\n for i in range(n):\n res[i] = prefix\n prefix *= nums[i]\n postfix = 1\n for i in range(n - 1, -1, -1):\n res[i] *= postfix\n postfix *= nums[i]\n return res", "initial_error": "AssertionError: product_except_self([1,2,3,4]) expected [24,12,8,6], got [24, 24, 16, 6]", "bug_location": {"function": "product_except_self", "line_start": 7}, "test_cases": [{"input": [[1, 2, 3, 4]], "expected_output": [24, 12, 8, 6]}, {"input": [[-1, 1, 0, -3, 3]], "expected_output": [0, 0, 9, 0, 0]}, {"input": [[2, 3]], "expected_output": [3, 2]}, {"input": [[1, 1, 1]], "expected_output": [1, 1, 1]}]} |
| {"id": "t1_028", "difficulty": 1, "bug_type": "off_by_one", "function_name": "product_except_self", "buggy_code": "def product_except_self(nums):\n n = len(nums)\n res = [1] * n\n prefix = 1\n for i in range(n):\n res[i] = prefix\n prefix *= nums[i]\n postfix = 1\n for i in range(n - 1, 0, -1):\n res[i] *= postfix\n postfix *= nums[i]\n return res", "original_code": "def product_except_self(nums):\n n = len(nums)\n res = [1] * n\n prefix = 1\n for i in range(n):\n res[i] = prefix\n prefix *= nums[i]\n postfix = 1\n for i in range(n - 1, -1, -1):\n res[i] *= postfix\n postfix *= nums[i]\n return res", "initial_error": "AssertionError: product_except_self([1,2,3,4]) expected [24,12,8,6], got [1,12,8,6]", "bug_location": {"function": "product_except_self", "line_start": 9}, "test_cases": [{"input": [[1, 2, 3, 4]], "expected_output": [24, 12, 8, 6]}, {"input": [[-1, 1, 0, -3, 3]], "expected_output": [0, 0, 9, 0, 0]}, {"input": [[2, 3]], "expected_output": [3, 2]}, {"input": [[1, 1, 1]], "expected_output": [1, 1, 1]}]} |
| {"id": "t1_029", "difficulty": 1, "bug_type": "wrong_operator", "function_name": "valid_parentheses", "buggy_code": "def valid_parentheses(s):\n stack = []\n mapping = {')': '(', '}': '{', ']': '['}\n for char in s:\n if char in mapping:\n top_element = stack.pop() if stack else '#'\n if mapping[char] == top_element:\n return False\n else:\n stack.append(char)\n return not stack", "original_code": "def valid_parentheses(s):\n stack = []\n mapping = {')': '(', '}': '{', ']': '['}\n for char in s:\n if char in mapping:\n top_element = stack.pop() if stack else '#'\n if mapping[char] != top_element:\n return False\n else:\n stack.append(char)\n return not stack", "initial_error": "AssertionError: valid_parentheses('()') expected True, got False", "bug_location": {"function": "valid_parentheses", "line_start": 7}, "test_cases": [{"input": ["()"], "expected_output": true}, {"input": ["()[]{}"], "expected_output": true}, {"input": ["(]"], "expected_output": false}, {"input": ["([)]"], "expected_output": false}]} |
| {"id": "t1_030", "difficulty": 1, "bug_type": "logic_inversion", "function_name": "valid_parentheses", "buggy_code": "def valid_parentheses(s):\n stack = []\n mapping = {')': '(', '}': '{', ']': '['}\n for char in s:\n if char in mapping:\n top_element = stack.pop() if stack else '#'\n if mapping[char] != top_element:\n return False\n else:\n stack.append(char)\n return bool(stack)", "original_code": "def valid_parentheses(s):\n stack = []\n mapping = {')': '(', '}': '{', ']': '['}\n for char in s:\n if char in mapping:\n top_element = stack.pop() if stack else '#'\n if mapping[char] != top_element:\n return False\n else:\n stack.append(char)\n return not stack", "initial_error": "AssertionError: valid_parentheses('()') expected True, got False", "bug_location": {"function": "valid_parentheses", "line_start": 11}, "test_cases": [{"input": ["()"], "expected_output": true}, {"input": ["()[]{}"], "expected_output": true}, {"input": ["(]"], "expected_output": false}, {"input": ["([)]"], "expected_output": false}]} |
| {"id": "t1_031", "difficulty": 1, "bug_type": "off_by_one", "function_name": "climbing_stairs", "buggy_code": "def climbing_stairs(n):\n if n <= 2:\n return n\n a, b = 1, 2\n for _ in range(3, n):\n a, b = b, a + b\n return b", "original_code": "def climbing_stairs(n):\n if n <= 2:\n return n\n a, b = 1, 2\n for _ in range(3, n + 1):\n a, b = b, a + b\n return b", "initial_error": "AssertionError: climbing_stairs(3) expected 3, got 2", "bug_location": {"function": "climbing_stairs", "line_start": 5}, "test_cases": [{"input": [2], "expected_output": 2}, {"input": [3], "expected_output": 3}, {"input": [1], "expected_output": 1}, {"input": [5], "expected_output": 8}]} |
| {"id": "t1_032", "difficulty": 1, "bug_type": "wrong_operator", "function_name": "climbing_stairs", "buggy_code": "def climbing_stairs(n):\n if n <= 2:\n return n\n a, b = 1, 2\n for _ in range(3, n + 1):\n a, b = b, a * b\n return b", "original_code": "def climbing_stairs(n):\n if n <= 2:\n return n\n a, b = 1, 2\n for _ in range(3, n + 1):\n a, b = b, a + b\n return b", "initial_error": "AssertionError: climbing_stairs(3) expected 3, got 2", "bug_location": {"function": "climbing_stairs", "line_start": 6}, "test_cases": [{"input": [2], "expected_output": 2}, {"input": [3], "expected_output": 3}, {"input": [1], "expected_output": 1}, {"input": [5], "expected_output": 8}]} |
| {"id": "t1_033", "difficulty": 1, "bug_type": "wrong_operator", "function_name": "house_robber", "buggy_code": "def house_robber(nums):\n if not nums:\n return 0\n if len(nums) == 1:\n return nums[0]\n dp = [0] * len(nums)\n dp[0] = nums[0]\n dp[1] = 9999\n for i in range(2, len(nums)):\n dp[i] = max(dp[i-1], dp[i-2] + nums[i])\n return dp[-1]", "original_code": "def house_robber(nums):\n if not nums:\n return 0\n if len(nums) == 1:\n return nums[0]\n dp = [0] * len(nums)\n dp[0] = nums[0]\n dp[1] = max(nums[0], nums[1])\n for i in range(2, len(nums)):\n dp[i] = max(dp[i-1], dp[i-2] + nums[i])\n return dp[-1]", "initial_error": "AssertionError: house_robber([2,7,9,3,1]) expected 12, got 11", "bug_location": {"function": "house_robber", "line_start": 8}, "test_cases": [{"input": [[1, 2, 3, 1]], "expected_output": 4}, {"input": [[2, 7, 9, 3, 1]], "expected_output": 12}, {"input": [[]], "expected_output": 0}, {"input": [[5]], "expected_output": 5}]} |
| {"id": "t1_034", "difficulty": 1, "bug_type": "off_by_one", "function_name": "house_robber", "buggy_code": "def house_robber(nums):\n if not nums:\n return 0\n if len(nums) == 1:\n return nums[0]\n dp = [0] * len(nums)\n dp[0] = nums[0]\n dp[1] = max(nums[0], nums[1])\n for i in range(1, len(nums)):\n dp[i] = max(dp[i-1], nums[i])\n return dp[-1]", "original_code": "def house_robber(nums):\n if not nums:\n return 0\n if len(nums) == 1:\n return nums[0]\n dp = [0] * len(nums)\n dp[0] = nums[0]\n dp[1] = max(nums[0], nums[1])\n for i in range(2, len(nums)):\n dp[i] = max(dp[i-1], dp[i-2] + nums[i])\n return dp[-1]", "initial_error": "IndexError: list index out of range", "bug_location": {"function": "house_robber", "line_start": 9}, "test_cases": [{"input": [[1, 2, 3, 1]], "expected_output": 4}, {"input": [[2, 7, 9, 3, 1]], "expected_output": 12}, {"input": [[]], "expected_output": 0}, {"input": [[5]], "expected_output": 5}]} |
| {"id": "t1_035", "difficulty": 1, "bug_type": "wrong_operator", "function_name": "intersection_of_arrays", "buggy_code": "def intersection_of_arrays(nums1, nums2):\n return list(set(nums1) | set(nums2))", "original_code": "def intersection_of_arrays(nums1, nums2):\n return list(set(nums1) & set(nums2))", "initial_error": "AssertionError: intersection_of_arrays([1,2,2,1], [2,2]) expected [2], got [1,2]", "bug_location": {"function": "intersection_of_arrays", "line_start": 2}, "test_cases": [{"input": [[1, 2, 2, 1], [2, 2]], "expected_output": [2]}, {"input": [[4, 9, 5], [9, 4, 9, 8, 4]], "expected_output": [9, 4]}, {"input": [[], [1]], "expected_output": []}, {"input": [[1, 2], [3, 4]], "expected_output": []}]} |
| {"id": "t1_036", "difficulty": 1, "bug_type": "wrong_operator", "function_name": "intersection_of_arrays", "buggy_code": "def intersection_of_arrays(nums1, nums2):\n return list(set(nums1) - set(nums2))", "original_code": "def intersection_of_arrays(nums1, nums2):\n return list(set(nums1) & set(nums2))", "initial_error": "AssertionError: intersection_of_arrays([1,2,2,1], [2,2]) expected [2], got [1]", "bug_location": {"function": "intersection_of_arrays", "line_start": 2}, "test_cases": [{"input": [[1, 2, 2, 1], [2, 2]], "expected_output": [2]}, {"input": [[4, 9, 5], [9, 4, 9, 8, 4]], "expected_output": [9, 4]}, {"input": [[], [1]], "expected_output": []}, {"input": [[1, 2], [3, 4]], "expected_output": []}]} |
| {"id": "t1_037", "difficulty": 1, "bug_type": "wrong_comparison", "function_name": "group_anagrams", "buggy_code": "def group_anagrams(strs):\n from collections import defaultdict\n ans = defaultdict(list)\n for s in strs:\n ans[tuple(s)].append(s)\n return list(ans.values())", "original_code": "def group_anagrams(strs):\n from collections import defaultdict\n ans = defaultdict(list)\n for s in strs:\n ans[tuple(sorted(s))].append(s)\n return list(ans.values())", "initial_error": "AssertionError: expected [['eat','tea','ate'],['tan','nat'],['bat']]", "bug_location": {"function": "group_anagrams", "line_start": 5}, "test_cases": [{"input": [["eat", "tea", "tan", "ate", "nat", "bat"]], "expected_output": [["eat", "tea", "ate"], ["tan", "nat"], ["bat"]]}, {"input": [[""]], "expected_output": [[""]]}, {"input": [["a"]], "expected_output": [["a"]]}, {"input": [["ab", "ba"]], "expected_output": [["ab", "ba"]]}]} |
| {"id": "t1_038", "difficulty": 1, "bug_type": "logic_inversion", "function_name": "group_anagrams", "buggy_code": "def group_anagrams(strs):\n from collections import defaultdict\n ans = defaultdict(list)\n for s in strs:\n ans[tuple(sorted(s))].append(s[::-1])\n return list(ans.values())", "original_code": "def group_anagrams(strs):\n from collections import defaultdict\n ans = defaultdict(list)\n for s in strs:\n ans[tuple(sorted(s))].append(s)\n return list(ans.values())", "initial_error": "AssertionError: expected [['eat','tea','ate'],['tan','nat'],['bat']]", "bug_location": {"function": "group_anagrams", "line_start": 5}, "test_cases": [{"input": [["eat", "tea", "tan", "ate", "nat", "bat"]], "expected_output": [["eat", "tea", "ate"], ["tan", "nat"], ["bat"]]}, {"input": [[""]], "expected_output": [[""]]}, {"input": [["a"]], "expected_output": [["a"]]}, {"input": [["ab", "ba"]], "expected_output": [["ab", "ba"]]}]} |
| {"id": "t1_039", "difficulty": 1, "bug_type": "wrong_operator", "function_name": "sum_digits", "buggy_code": "def sum_digits(n):\n total = 0\n while n > 0:\n total *= n % 10\n n //= 10\n return total", "original_code": "def sum_digits(n):\n total = 0\n while n > 0:\n total += n % 10\n n //= 10\n return total", "initial_error": "AssertionError: sum_digits(123) expected 6, got 0", "bug_location": {"function": "sum_digits", "line_start": 4}, "test_cases": [{"input": [123], "expected_output": 6}, {"input": [0], "expected_output": 0}, {"input": [999], "expected_output": 27}, {"input": [10], "expected_output": 1}]} |
| {"id": "t1_040", "difficulty": 1, "bug_type": "off_by_one", "function_name": "factorial", "buggy_code": "def factorial(n):\n if n <= 0:\n return 0\n return n * factorial(n - 1)", "original_code": "def factorial(n):\n if n == 0:\n return 1\n return n * factorial(n - 1)", "initial_error": "AssertionError: factorial(3) expected 6, got 0", "bug_location": {"function": "factorial", "line_start": 3}, "test_cases": [{"input": [0], "expected_output": 1}, {"input": [1], "expected_output": 1}, {"input": [5], "expected_output": 120}, {"input": [3], "expected_output": 6}]} |
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