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Cod sursa(job #160486)
/* algoritmul Roy-Floyd */
#include<fstream.h>
ifstream f("royfloyd.in");
ofstream g("royfloyd.out");
long a[100][100],n;
int inf=30000;
void cit()
{ f>>n;
for(register i=1;i<=n;i++)
for(register j=1;j<=n;j++)
f>>a[i][j];
}
void rf()
{
for(register k=1;k<=n;k++)
for(register i=1;i<=n;i++)
for(register j=1;j<=n;j++)
if(a[i][j]>a[i][k]+a[k][j])
a[i][j]=a[i][k]+a[k][j];
}
void tip()
{ for(register i=1;i<=n;i++)
{ for(register j=1;j<=n;j++)
g<<a[i][j]<<' ';
g<<endl;}
}
int main()
{ cit();
rf();
tip();
return 0; }