#include using namespace std; using ll=long long; int main(){ int n;cin>>n; vector> a(n,vector(n)); for(int i=0;i>a[i][j]; bool f1=true,f2=true,f3=true,f4=true; for(int i=0;ia[i][k]+a[k][j])f3=false; if(a[i][j]>max(a[i][k],a[k][j]))f4=false; } } if(f1&&f2&&f3)cout<<"Yes"<