func_code_string: #include <bits/stdc++.h>   using namespace std;   const int INF = (1 << 30) - 1;   const long double EPS = 1e-9;   const long double PI = fabs(atan2(0.0, -1.0));   int get(int n) {     int res = 0;     for (int b = 0; n > 0; b++) {       if (n & 1) res = b;       n >>= 1;     }     return res;   }   int p[1000100];   void solve() {     int n;     cin >> n;     vector<bool> was(n + 1, false);     for (int i = n; i >= 0; i--) {       for (int k = 23; k >= 0; k--) {         int cur = (1 << k) - 1;         int add = cur - i;         if (add < 0 || add > n) continue;         if (was[add]) continue;         was[add] = true;         p[i] = add;         break;       }     }     printf(          %lld            n ,         n * 1LL * (n + 1));     for (int i = 0; i <= n; i++) {       if (i > 0) printf(   );       printf( %d , p[i]);     }     printf(  n );   }   int main() {     solve();     return 0;   }   