#include<bits/stdc++.h>
using namespace std;
using u64 = uint_least64_t;
using s64 = int_least64_t;
using ll = uint_least64_t;

int main(){
	int n,m;
	cin >> n >> m;
	vector<int> u(m),v(m),w(m);
	for (int i = 0; i < m; i++){
		cin >> u[i] >> v[i] >> w[i];
	}

	cout << n << endl;
	return 0;
}