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Cod sursa(job #668119)
#include<fstream>
using namespace std;
ifstream f("royfloyd.in");
ofstream g("royfloyd.out");
int i,j,k,n,a[51][51];
void citire()
{f>>n;
for(i=1;i<=n;i++)
for(j=1;j<=n;j++)
f>>a[i][j];
}
void roy()
{for(k=1;k<=n;k++)
for(i=1;i<=n;i++)
for(j=1;j<=n;j++)
if (i!=j)if(a[i][j]==0 && (a[i][k]*a[k][j])) a[i][j]=(a[i][k]+a[k][j]);
else if(a[i][j]>a[i][k]+a[k][j] && i!=j && (a[i][k]*a[k][j]) && i!=k && j!=k) a[i][j]=a[i][k]+a[k][j];
}
void afisare()
{for(i=1;i<=n;i++)
{for(j=1;j<=n;j++)
g<<a[i][j]<<' ' ;
g<<'\n';}}
int main()
{citire(); roy(); afisare(); return 0; }