523. Continuous Subarray Sum

class Solution {
public:bool checkSubarraySum(vector<int>& nums, int k) {unordered_map<int,int> m;   // 从头元素开始的sum，取模为key的index。m[0] = -1;int _sum = 0;for (int i = 0; i < nums.size(); i++) {_sum += nums[i];if (k != 0)  _sum = _sum % k;if (m.find(_sum) != m.end()) {if (m[_sum]+1 < i)return true;}else {m[_sum] = i;}}return false;}
};

转载于:https://www.cnblogs.com/JTechRoad/p/9108501.html

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