Subarray Sum Equals K
Updated Feb 24, 2026
Problem
Count contiguous subarrays that sum to k.
Constraints
1 <= nums.length <= 2*10^4
Examples
Example 1
Input:
{"nums": [1, 1, 1], "k": 2}
Output:
2
Function Signature
def subarraySum(self, nums: list[int], k: int) -> int
How to Submit
Implement a Solution class with a subarraySum method.
Your method will be called with the input parameters and should return the answer.