func_code_string: #include <bits/stdc++.h>   using namespace std;   const int INF = 0x3f3f3f3f;   const int maxn = 1e5 + 7;   int n, x;   int main() {     cin >> n >> x;     int ans = 0, num = 0;     if (n == 2 && x == 0) {       puts( NO );       return 0;     }     puts( YES );     if (n == 1)       printf( %d , x);     else if (n == 2)       printf( %d %d , 0, x);     else if (n == 3) {       int t1 = 1 << 18;       int t2 = 1 << 19;       int t3 = x ^ t1 ^ t2;       printf( %d %d %d , t1, t2, t3);     } else {       for (int i = 1;; i++) {         if (i == x) continue;         ans ^= i;         printf( %d  , i);         num++;         if (num == n - 3) break;       }       int t1 = 1 << 18;       int t2 = 1 << 19;       int t3 = x ^ ans ^ t1 ^ t2;       printf( %d %d %d , t1, t2, t3);       ans ^= t1 ^ t2 ^ t3;     }     return 0;   }   