#include <iostream>
using namespace std;

int N,ponderi[101][101]={-1},i,j,k;

int main()
{
	freopen("royfloyd.in","r",stdin);
	freopen("royfloyd.out","w",stdout);

	cin>>N;
	
	for (i=0;i<N;++i)
		for (j=0;j<N;++j)
			cin>>ponderi[i][j];
	
	for	(k=0;k<N;++k)
		for (i=0;i<N;++i)
			for (j=0;j<N;++j)
				if (ponderi[i][j]>ponderi[i][k]+ponderi[j][k])
					ponderi[i][j]=ponderi[i][k]+ponderi[j][k];
				
//	for (i=0;i<N;++i)
//	{
//		for (j=0;j<N;++j)
//			cout<<ponderi[i][j]<<" ";
//		cout<<endl;
//	}

}