#include #include #include #include #include using namespace std; using i32 = int; using u32 = unsigned int; using i64 = long long; using u64 = unsigned long long; #define rep(i,n) for(int i=0; i<(int)(n); i++) const i64 INF = 1001001001001001001; using Modint = atcoder::static_modint<998244353>; int main(){ int N; cin >> N; vector> A(N); rep(i,N){ A[i].resize(N); rep(j,N) cin >> A[i][j]; } bool ok = true; rep(i,N) rep(j,N) rep(k,N) if(A[i][A[j][k]] != A[A[i][j]][k]) ok = false; int e = -1; rep(f,N){ bool fnd = true; rep(i,N) if(A[f][i] != i) fnd = false; if(fnd) e = f; } if(e == -1) ok = false; rep(i,N){ bool f = false; rep(j,N) if(A[i][j] == e) f = true; if(!f) ok = false; } cout << (ok ? "Yes\n" : "No\n"); return 0; } struct ios_do_not_sync{ ios_do_not_sync(){ ios::sync_with_stdio(false); cin.tie(nullptr); } } ios_do_not_sync_instance;