leetcode1546题解【前缀和+贪心】

class Solution {
public:
    int maxNonOverlapping(vector<int>& nums, int target) {
        int len = nums.size();
        int sum = 0, res = 0;
        set<int> hs;    //记录前缀和
        hs.insert(0);
        for(int i = 0; i < len; i++){
            sum += nums[i];
            if(hs.find(sum - target) != hs.end()){
                sum = 0;
                hs.clear();     //为了不让子数组重叠，需要清空数组
                res++;  
            }   
            hs.insert(sum);
        }
        return res;
    }
};