差分运算（使用C++匿名函数，让代码更简洁。）

#include <bits/stdc++.h>
using namespace std;
int main()
{
    int n,m; cin >> n >> m;
    vector<int> nums(n+2, 0);
    auto insert = [&](int l, int r, int c) {
        nums[l] += c; nums[r+1] -= c;
    };

    for (int i = 1; i <= n; ++i) {
        int t; cin >> t;
        insert(i, i, t);
    }
    for (int i = 1; i <= m; ++i) {
        int l, r, c; cin >> l >> r >> c;
        insert(l, r, c);
    }
    for (int i = 1; i <= n; ++i) {
        nums[i] += nums[i-1];
        cout << nums[i] << ' '; 
    }
    return 0;
}