Map-560. Subarray Sum Equals K
Given an array of integers and an integer k, you need to find the total number of continuous subarrays whose sum equals to k.
Example 1:
- Input:nums = [1,1,1], k = 2
- Output: 2
Note:
- The length of the array is in range [1, 20,000].
- The range of numbers in the array is [-1000, 1000] and the range of the integer k is [-1e7, 1e7].
- public int subarraySum(int[] nums, int k) {
- int res = 0;
- if (nums == null || nums.length == 0) return 0;
- for (int i = 0; i < nums.length; i++) {
- int temp = k;
- for (int j = i; j >= 0; j--) {
- temp = temp - nums[j];
- if (temp == 0) res++;
- }
- }
- return res;
- }
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