1480. Dynamic sum of one-dimensional array

Original link ：1480. The dynamic sum of one-dimensional arrays

  

solution:
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class Solution {
public:
    vector<int> runningSum(vector<int>& nums) {
        for(int i = 0;i < nums.size();i++) {
            if(i) nums[i] += nums[i - 1];
        }
        return nums;
    }
};