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Count subarrays with sum equals k
Count Subarrays with Sum Equals K
Given an integer array nums (which may contain negative numbers and zeros) and an integer k, return the number of contiguous subarrays whose sum is exactly k.
Requirements
- The subarray must be contiguous.
- Your algorithm should correctly handle negative values and zeros within the
numsarray.
Input / Output
- Input:
nums: int[],k: int - Output:
count: int(the total number of contiguous subarrays with sumk)
Example
nums = [1, 2, 3], k = 3→ Output:2- Explanation: The subarrays
[1,2]and[3]both sum to3.
- Explanation: The subarrays
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Core dilemma
Efficiently counting all contiguous subarrays with an exact target sum in an array that may contain negative numbers, balancing time and space complexity.
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Count subarrays with sum equals k
Count Subarrays with Sum Equals K
Given an integer array nums (which may contain negative numbers and zeros) and an integer k, return the number of contiguous subarrays whose sum is exactly k.
Requirements
- The subarray must be contiguous.
- Your algorithm should correctly handle negative values and zeros within the
numsarray.
Input / Output
- Input:
nums: int[],k: int - Output:
count: int(the total number of contiguous subarrays with sumk)
Example
nums = [1, 2, 3], k = 3→ Output:2- Explanation: The subarrays
[1,2]and[3]both sum to3.
- Explanation: The subarrays