Minimum Value to Get Positive Step by Step Sum.cpp

class Solution {
public:
    int minStartValue(vector<int>& nums) {
        int ret=1;
        int mn=1;
        for(auto it : nums){
            ret+=it;
            mn=min(mn,ret);
        }
        if(mn<1){
            ret=2-mn;
        }else{
            ret=1;
        }
        return ret;
    }
};