#include<bits/stdc++.h>
#define ll long long
#define endl '\n'
#define up(i,j,k,l) for(int i=j;i<=k;i+=l)
#define down(i,j,k,l) for(int i=j;i>=k;i-=l)
using namespace std;
const int N=1e2+10,INF=1e9;
int n,m;
int a[N][N];
int u,v,w;
void solve()
{
	cin>>n>>m;
	up(i,1,n,1){
		up(j,1,n,1){
			a[i][j]=INF;
		}
		a[i][i]=0;
	}
	up(i,1,m,1){
		cin>>u>>v>>w;
		a[u][v]=min(a[u][v],w);
		a[v][u]=a[u][v];
	}
	up(k,1,n,1){
		up(i,1,n,1){
			up(j,1,n,1){
				a[i][j]=min(a[i][j],a[i][k]+a[k][j]);
			}
		}
	}
	up(i,1,n,1){
		up(j,1,n,1){
			cout<<a[i][j]<<' ';
		}
		cout<<endl;
	}
	return;
}
int main()
{
    //ios::sync_with_stdio(false);
	//cin.tie(0);
	//freopen(".in","r",stdin);
	//freopen(".out","w",stdout);
	int _=1;
	//cin>>_;
	up(i,1,_,1){
		solve();
	}
	return 0;
}