Subarray with Sum Equals K

Given an integer array and an integer K, find the number of continuous subarrays whose sum equals to K. The input consists of a single line with space-separated integers for the array followed by the integer K. The output should be a single integer, the count of subarrays. Example: Input: 1 1 1 2 3 Output: 2 Explanation: The continuous subarrays that sum to 3 are [1, 1, 1] and [1, 2].