#include<bits/stdc++.h>
using namespace std;
 
int main()
{
    int node, edge;
    cin>>node>>edge;
    int u, v, w;
    int graph[node+1][node+1];
    memset(graph, 0, sizeof(graph));
    for(int i = 1; i <= edge; i++)
    {
        cin>>u>>v>>w;
        graph[u][v] = w;
        graph[v][u] = w;
    }
 
    /// i = node, j = node
    for(int i = 1; i <node+1; i++)
    {
        for(int j = 1; j < node+1; j++)
        {
            cout<<graph[i][j]<<" ";
        }
        cout<<endl;
    }
 
 
}
 

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1 2 3
2 3 4
3 4 5
4 1 2
1 3 6
2 5 3
3 5 7