#include<bits/stdc++.h>
#define ll long long
using namespace std;
const int N=1005;
ll n,m;
ll e[N][N];
int main(){
	cin>>n>>m;
	for(int i=1;i<=n;i++){
		for(int j=1;j<=n;j++){
			e[i][j]=0x7f;
			if(i==j )e[i][j]=0;
		}
	}
	for(int k=1;k<=m;k++){
		ll x,y,z;
		cin>>x>>y>>z;
		e[x][y]=min(e[x][y],z);
		e[y][x]=min(e[y][x],z);
	}
	for(int k=1;k<=n;k++){
		for(int i=1;i<=n;i++){
			for(int j=1;j<=n;j++){
				e[i][j]=min(e[i][j],e[i][k]+e[k][j]);
			}
		}
	}
	for(int i=1;i<=n;i++){
		for(int j=1;j<=n;j++){
			cout<<e[i][j]<<" ";
		}cout<<endl;
	}
	return 0;
}