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- #include <iostream>
- using namespace std;
- int main()
- {
- int n,m;
- cin>>n>>m;
- int G[n][n];
- for (int i=0;i<n;i++)
- for (int j=0;j<n;j++)
- G[i][j]=-1;
- for (int i=0;i<n;i++)
- G[i][i]=0;
- int a,b,c;
- for (int i=0;i<m;i++)
- {
- cin>>a>>b>>c;
- G[a][b]=c;
- G[b][a]=c;
- }
- for (int i=0;i<n;i++)
- {
- for (int j=0;j<n;j++)
- cout<<G[i][j]<<' ';
- cout<<endl;
- }
- return 0;
- }
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