#include #define int long long using namespace std; const int INF=1e18; void chmin(int&a,int b){if(a>b)a=b;} int N,M,dist[110][110]; signed main(){ cin>>N>>M; fill(dist[0],dist[N],INF); for(int i=0;i>a>>b>>c; chmin(dist[a-1][b-1],c); } for(int k=0;k