#include "leetcode.h" class Solution { public: vector runningSum(vector &nums) { vector ans; int count = 0, n = nums.size(); for (int i = 0; i < n; i++) count += nums[i], ans.push_back(count); return ans; } }; int main() { vector nums = {1, 2, 3, 4}; Solution obj; obj.runningSum(nums); }