#include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include template inline bool chmax(T& a, T b) { if (a < b) { a = b; return 1; } return 0; } template inline bool chmin(T& a, T b) { if (a > b) { a = b; return 1; } return 0; } const long long MAX = 5100000; const long long INF = 1LL << 60; const long long mod = 1000000007LL; //const long long mod = 998244353LL; using namespace std; typedef unsigned long long ull; typedef long long ll; ll a, b; bool dfs(ll x, ll y, map, bool> mp) { if (mp.find(make_pair(x, y)) != mp.end()) mp[make_pair(x, y)]; if (x == a && y == b) return true; ll nx1 = x * 2; ll ny1 = y + 1; bool flag = false; if (nx1 <= a && ny1 <= b) flag |= dfs(nx1, ny1, mp); ll nx2 = x + 1; ll ny2 = y * 2; if (nx2 <= a && ny2 <= b) flag |= dfs(nx2, ny2, mp); return mp[make_pair(x, y)] = flag; } int main() { /* cin.tie(nullptr); ios::sync_with_stdio(false); */ cin >> a >> b; if (a * b == 0) puts("Yes"); else { bool flag = false; map, bool> mp; if (a < b) swap(a, b); flag |= dfs(1, 0, mp); if (flag) puts("Yes"); else puts("No"); } return 0; }