370. Range Addition

https://leetcode.com/problems/range-addition/description/

题目大意:给一个二维数组,其中每个数组长度为3,包含了更新信息.
解题思路:直接读取更新即可.

class Solution {
public:
    vector<int> getModifiedArray(int length, vector<vector<int>>& updates) {
        vector<int> res(length);
        for (auto u : updates) {
            for (int i = u[0]; i <= u[1]; i++) {
                res[i] += u[2];
            }
        }
        return res;
    }
};