版权声明:本文为博主原创文章,未经博主允许不得转载。 https://blog.csdn.net/sugarbliss/article/details/82900518
#include <bits/stdc++.h>
using namespace std;
vector<pair<int, int>> mp[5005];
int main()
{
int n, m;
cin >> n >> m;
for (int i = 1; i <= m; i++)
{
int x, y, w;
cin >> x >> y >> w;
mp[x].push_back({y, w});
}
for (int i = 1; i <= m; i++)
for (auto &it : mp[i])
cout << i << " " << it.first << " " << it.second << endl;
return 0;
}