#include<cstdio>
#include<iostream>
using namespace std;
int main(){
	int e[10][10],k,i,j,n,m,t1,t2,t3;
	int inf=999999;
	cin>>n>>m;
	for(i=1;i<=n;i++)
	 for(j=1;j<=n;j++)
	   if(i==j) e[i][j]=0;
	   else e[i][j]=inf;
	   for(i=1;i<=m;i++){
	   	cin>>t1>>t2>>t3;
	   	e[t1][t2]=t3;
	   }
	   for(k=1;k<=n;k++)
	    for(i=1;i<=n;i++)
	     for(j=1;j<=n;j++)
	     if(e[i][j]>e[i][k]+e[k][j])
	      e[i][j]=e[i][k]+e[k][j];
	for(i=1;i<=n;i++){
	 for(j=1;j<=n;j++){
	 	cout<<e[i][j]<<" ";
	 }
	 cout<<endl;
}
}