#include<bits/stdc++.h> using namespace std; int a[21][21],n,x,h[21],l[21],y; int main(){ cin>>n; for(int i=1;i<=n;i++){ for(int j=1;j<=n;j++){ cin>>a[i][j]; if(i==j) x+=a[i][j]; if(i+j==n+1) y+=a[i][j]; h[i]+=a[i][j]; l[j]+=a[i][j]; } } int f=1; for(int i=1;i<=n;i++) if(x!=h[i]||x!=l[i]||x!=y){ f=0; break; } if(f) cout<<"Yes"; else cout<<"No" ; return 0; }