#include using namespace std; int main() { ios_base::sync_with_stdio(false); cin.tie(NULL); int n; cin >> n; n = n * 2; set st; for (int i = 1; i * i <= n; i++) { st.insert(i * (i + 1)); } bool ok = false; for (auto x : st) { cerr << x << endl; if(st.count(n - x)) { ok = true; break; } } cout << (ok ? "YES" : "NO") << endl; }