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#include <iostream>
#include <fstream>
using namespace std;
ifstream fin("royfloyd.in");
ofstream fout("royfloyd.out");
int N, A[105][105];
void Read()
{
fin>>N;
for(int i=1;i<=N;++i)
for(int j=1;j<=N;++j)
fin>>A[i][j];
}
void RF()
{
for(int k=1;k<=N;++k)
for(int i=1;i<=N;++i)
for(int 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 Print()
{
for(int i=1;i<=N;++i)
for(int j=1;j<=N;++j)
fout<<A[i][j];
}
int main()
{
Read(); RF(); Print();
return 0;
}