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Cod sursa(job #240517)
#include<fstream>
using namespace std;
int main()
{
ifstream f ("royfloyd.in");
ofstream g ("royfloyd.out");
int a[100][100], n, i, j, k;
f>>n;
for(i=0;i<n;i++)
for(j=0;j<n;j++)
f>>a[i][j];
for(k=0;k<n;k++)
for(i=0;i<n;i++)
for(j=0;j<n;j++)
if(a[i][j]&&a[i][k]&&a[k][j]&&(a[i][k]+a[k][j]<a[i][j])||!a[i][j]&&i!=j) a[i][j]=a[i][k]+a[k][j];
for(i=0;i<n;i++)
{
for(j=0;j<n;j++)
g<<a[i][j]<<" ";
g<<"\n";
}
f.close();
g.close();
return 0;
}