//#define _GLIBCXX_DEBUG #include #define rep(i, n) for(int i=0; i; using vs = vector; using vi = vector; using vvi = vector; template using PQ = priority_queue; template using PQG = priority_queue, greater >; const int INF = 0xccccccc; const ll LINF = 0xcccccccccccccccLL; template inline bool chmax(T1 &a, T2 b) {return a < b && (a = b, true);} template inline bool chmin(T1 &a, T2 b) {return a > b && (a = b, true);} template istream &operator>>(istream &is, pair &p) { return is >> p.first >> p.second;} template ostream &operator<<(ostream &os, const pair &p) { return os << p.first << ' ' << p.second;} //head int main() { ios::sync_with_stdio(false); cin.tie(0); int n, z; cin >> n >> z; if(n >= 3) { cout << "No\n"; return 0; } if(n == 1) { if(z > 1) cout << "Yes\n"; else cout << "No\n"; return 0; } z *= z; vi x; for(int i = 1; i*i < z; i++) x.emplace_back(i*i); rep(i, x.size()) { auto itr = lower_bound(all(x), z-x[i]); if(*itr+x[i] == z) { cout << "Yes\n"; return 0; } } cout << "No\n"; }