#include<bits/stdc++.h> using namespace std; int n,a[30][30],x,s,sh,sl[30]={0},d1,d2; int main(){ cin>>n; for(int i=1;i<=n;i++){ for(int j=1;j<=n;j++){ cin>>a[i][j]; s+=a[i][j]; } } x=s/n; for(int i=1;i<=n;i++){ sh=0; for(int j=1;j<=n;j++){ sh+=a[i][j]; sl[j]+=a[i][j]; if(i==j) d1+=a[i][j]; if(i+j==1+n) d2+=a[i][j]; } if(sh!=x){ cout<<"No"; return 0; } } for(int j=1;j<=n;j++){ if(sl[j]!=x){ cout<<"No"; return 0; } } if(d1!=x||d2!=x){ cout<<"No"; return 0; } cout<<"Yes"; return 0; }