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Cod sursa(job #631806)
#include<stdio.h>
using namespace std;
int n,a[100][100];
void citire()
{
freopen("royfloyd.in","r",stdin);
int i,j;
scanf("%d",&n);
for(i=1;i<=n;i++)
for(j=1;j<=n;j++)
scanf("%d",&a[i][j]);
}
void constructie()
{
int i,j,x;
for(x=1;x<=n;x++)
for(i=1;i<=n;i++)
for(j=1;j<=n;j++)
if(a[i][x]!=0&&a[x][j]!=0&&i!=j&&(a[i][j]>a[i][x]+a[x][j]||!a[i][j]))
a[i][j]=a[i][x]+a[x][j];
}
void afisare()
{
freopen("royfloyd.out","w",stdout);
int i,j;
for(i=1;i<=n;i++)
{
for(j=1;j<=n;j++)
printf("%d ",a[i][j]);
printf("\n");
}
}
int main()
{
citire();
constructie();
afisare();
return 0;
}