func_code_string: #include <bits/stdc++.h>   using namespace std;   const long long inf = 1ll << 18;   long long a, b, top, now;   queue<long long> q;   map<long long, int> mp;   long long rev(long long x) {     long long y = 0;     while (x != 0) {       y = (y << 1) | (x & 1);       x >>= 1;     }     return y;   }   void push(long long &x) {     if (x > b && rev(x) > b) return;     if (mp.find(x) == mp.end()) {       q.push(x);       mp[x] = 1;     }   }   string solve() {     if (a == b) return  YES ;     q.push(a);     mp[a] = 1;     while (!q.empty()) {       top = q.front();       q.pop();       now = rev(top << 1);       if (now == b) return  YES ;       push(now);       now = rev((top << 1) | 1);       if (now == b) return  YES ;       push(now);     }     return  NO ;   }   int main() {     ios::sync_with_stdio(false);     cin.tie(0);     cin >> a >> b;     cout << solve() << endl;     return 0;   }   