#include<bits/stdc++.h>
using namespace std;
int a[105][105],dp[105][105];
int main(){
	//freopen(".in","r",stdin);
	//freopen(".out","w",stdout);
	int n,m,x,y,z;
	cin>>n>>m;
	for(int i = 1;i <= n;i++){
		for(int j = 1;j <= n;j++){
			if(i != j){
			    a[i][j] = 0x3f3f3f3f;
			}
		}
	}
	for(int i = 0;i < m;i++){
		cin>>x>>y>>z;
		a[x][y] = z,a[y][x] = z;
	}
	for(int i = 1;i <= n;i++){
		for(int j = 1;j <= n;j++){
			for(int k = 1;k <= n;k++){
				a[i][j] = min(a[i][j],a[i][k] + a[k][j]);
			}
		}
	}
	for(int i = 1;i <= n;i++){
		for(int j = 1;j <= n;j++){
			cout<<a[i][j]<<" ";	
		}
		cout<<endl;
	}
	return 0;
}