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Cod sursa(job #831702)
#include <fstream>
#define inf (1<<29)
using namespace std;
ifstream f("royfloyd.in");
ofstream g("royfloyd.out");
int n, a[101][101];
int main()
{
f>>n;
int i,j,k;
for(i=1;i<=n;i++)
for(j=1;j<=n;j++)
{
f>>a[i][j];
if(!a[i][j] && i!=j) a[i][j]=inf;
}
for(k=1;k<=n;k++)
for(i=1;i<=n;i++)
for(j=1;j<=n;j++)
if(a[i][k] && a[k][j] && a[i][j]>a[i][k]+a[k][j] && i!=j) a[i][j]=a[i][k]+a[k][j];
for(i=1;i<=n;i++)
{
for(j=1;j<=n;j++)
{
if(a[i][j]==inf) g<<0<<' ';
else g<<a[i][j]<<' ';
}
g<<endl;
}
}