#include #include #define SELECTER(_1,_2,_3,SELECT,...) SELECT #define rep1(i,n) for(int i=0;i<(int)n;++i) #define rep2(i,a,n) for(int i=(int)a;i<(int)n;++i) #define rep(...) SELECTER(__VA_ARGS__,rep2,rep1)(__VA_ARGS__) #define RSELECTER(_1, _2, _3, RSELECT, ...) RSELECT #define rrep1(i,n) for(int i=(int)n-1;i>=0;--i) #define rrep2(i,a,n) for(int i=(int)n-1;i>=(int)a;--i) #define rrep(...) RSELECTER(__VA_ARGS__, rrep2, rrep1)(__VA_ARGS__) #define all(a) a.begin(),a.end() #define rall(a) a.rbegin(),a.rend() #define fi first #define se second #define PrintR LogOutput #ifdef _DEBUG #define Log(...) LogOutput(__VA_ARGS__) #else #define Log(...) #endif using namespace std; using namespace atcoder; using ll=long long; using pii=pair; using pll=pair; using pdd=pair; using veci=vector; using vecpii=vector>; using vecll=vector; using vecpll=vector>; using vecpdd=vector>; using vecs=vector; using vecb=vector; using vecd=vector; using tp=tuple; using tpll=tuple; using mint=modint998244353; using mint10=modint1000000007; template istream& operator>>(istream& in, pair& a){return in >> a.first >> a.second;} template ostream& operator<<(ostream& out, const pair& a){return out << a.first << ' ' << a.second;} ostream& operator<<(ostream& out, const mint& a){return out << a.val();} ostream& operator<<(ostream& out, const mint10& a){return out << a.val();} ostream& operator<<(ostream& out, const modint& a){return out << a.val();} template ostream& operator<<(ostream& out, const vector& d){for(int i = 0 ; i < d.size() ; ++i) out << d[i] << ' '; return out;} template pair operator+(const pair& a, const pair& b){return {a.fi + b.fi, a.se + b.se};} template pair operator-(const pair& a, const pair& b){return {a.fi - b.fi, a.se - b.se};} template inline bool chmax(T& a,T b){if(a inline bool chmin(T& a,T b){if(a>b) {a=b;return true;} return false;} constexpr ll INF=numeric_limits::max() / 4; constexpr ll MOD=998244353; template void LogOutput(Args&&... args){ stringstream ss; ((ss << args << ' '), ...); cout << ss.str().substr(0, ss.str().length() - 1) << endl; } template void LogOutput(vector>& data){for(auto d : data) LogOutput(d);} int main(){ ios::sync_with_stdio(false); std::cin.tie(nullptr); int n;cin>>n; vector a(n, veci(n)); rep(i, n) rep(j, n) cin>>a[i][j]; bool b = true; rep(i, n) rep(j, n) rep(k, n){ if(a[a[i][j]][k] != a[i][a[j][k]]) b = false; } bool b2 = false; rep(i, n){ bool c = true; rep(j, n){ if(a[i][j] != j || j != a[j][i]) c = false; bool d = true; rep(k, n){ if(a[j][k] == i && i == a[k][j]) d = false; } if(d) c = false; } if(c) b2 = true; } if(b && b2) cout<<"Yes"<