#include <bits/stdc++.h>
using namespace std;
//#include <atcoder/all>
//using namespace atcoder;
using ll=long long;
using Graph=vector<vector<int>>;
#define MAX 1000000
#define MOD 1000000009
//#define MOD 998244353
#define INF 1000000000
//#define INF 1000000000000000000

int main(){
  int N,M;
  cin>>N>>M;
  for(int i=0;i<M;i++){
    int u,v,w;
    cin>>u>>v>>w;
  }
  cout<<N<<endl;
}