# include <iostream>
# include <fstream>

using namespace std;

fstream f("royfloyd.in",ios::in);
fstream g("royfloyd.out",ios::out);

int n,a[105][105];

void floyd()
{
    int i,j,k;
    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] || !a[i][j]) && i!= j)
              a[i][j]=a[i][k]+a[k][j];
}

void afis()
{
    int i,j;
    for (i=1;i<=n;i++)
    {
        for (j=1;j<=n;j++)
            g<<a[i][j]<<" ";
        g<<"\n";
    }
}
int main()
{
    f>>n;
    for(i=1;i<=n;i++)
    for(j=1;j<=n;j++)
    f>>a[i][j];
f.close();
g.close();
return 0;
}