func_code_string: #include <bits/stdc++.h>   using namespace std;   const int N = 100100;   long long n, x;   void printbin(long long a) {     for (int i = 20; i >= 0; i--) {       long long c = a & (1LL << i);       cout << bool(c);     }     cout <<   n ;   }   int main() {     cin >> n >> x;     long long reversed = 0;     reversed |= 1LL << 17;     if (n == 1) {       cout <<  YES n  << x;       return 0;     }     if (n == 2 && x == 0) {       cout <<  NO n ;       return 0;     }     if (n == 2) {       cout <<  YES n  << 0 <<     << x <<   n ;       return 0;     }     cout <<  YES n ;     long long value = 0;     long long test = 0;     for (int i = 1; i <= n - 3; i++) {       cout << i <<    ;       value ^= i;       test ^= i;     }     reversed = x ^ value;     reversed |= 1LL << 17;     long long temp2 = 1LL << 17;     if (reversed == 1LL << 17) {       reversed |= 1LL << 18;       long long temp = 1LL << 18;       cout << reversed <<     << temp <<     << (temp ^ reversed) <<   n ;     } else {       cout << reversed <<     << temp2 <<     << 0 <<   n ;     }     return 0;   }   