#ifdef NACHIA #define _GLIBCXX_DEBUG #else #define NDEBUG #endif #include #include #include #include #include using i64 = long long; using u64 = unsigned long long; #define rep(i,n) for(i64 i=0; i void chmin(A& l, const A& r){ if(r < l) l = r; } template void chmax(A& l, const A& r){ if(l < r) l = r; } using namespace std; void testcase(){ double x; cin >> x; if(abs(sin(x) - round(sin(x))) <= 1e-14){ cout << "Yes\n"; } else { cout << "No\n"; } } int main(){ ios::sync_with_stdio(false); cin.tie(nullptr); testcase(); return 0; }