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Cod sursa(job #281220)
#include<stdio.h>
#include<iostream.h>
int n,mat[102][102],i,j,k;
int main()
{
freopen("royfloyd.in","r",stdin);
freopen("royfloyd.out","w",stdout);
scanf("%d",&n); cout<<n<<endl;
for(i=1; i<=n; i++)
for(j=1; j<=n; j++) scanf("%d",&mat[i][j]);
for(k=1; k<=n; k++)
for(i=1; i<=n; i++)
for(j=1; j<=n; j++)
if( i!=j && mat[i][k]!=0 && mat[k][j]!=0)
if( mat[i][k]+mat[k][j]<mat[i][j] || mat[i][j]==0)
mat[i][j]=mat[i][k]+mat[k][j];
for(i=1; i<=n; i++) { printf("\n");
for(j=1; j<=n; j++) printf("%d ",mat[i][j]); }
}