C++软件试用期检测

1.10分代码 

#include <bits/stdc++.h>
using namespace std;
#define endl '\n'
#define int long long int
int n;
int a[20], t[20], d[20], l[20];
int dfs(int x, int time) {
	if (x >= n)
		return 1;
	for (int i = 1; i <= n; i++) {
		if (!a[i] && t[i] + d[i] >= time) {
			a[i] = 1;
			int u = max(time, t[i])+l[i];
			if (dfs(x + 1, u))
				return 1;
			a[i] = 0;//回溯
		}
	}
	return 0;
}
void solve() {
	cin >> n;
	for (int i = 1; i <= n; i++) {
		cin >> t[i] >> d[i] >> l[i];
	}
	memset(a, 0, sizeof(a));
	if (dfs(1, -1))
		cout << "YES" << endl;
	else
		cout << "NO" << endl;
		
}
signed main() {
	ios::sync_with_stdio(0);
	cin.tie(0);
	int t = 1;
	cin >> t;
	while (t--)
	solve();
    return 0;
}