func_code_string: #include <bits/stdc++.h>   using namespace std;   int main(int argc, char **argv) {     int n;     long long m;     cin >> n >> m;     m -= 1;     vector<int> xs;     for (int i = 0; i < n; i++) {       xs.push_back(-1);     }     int i = 0;     int u = 0;     int v = n - 1;     while (u <= v) {       long long h = (1LL << (n - i - 2));       if (m >= h) {         xs[v] = i;         v -= 1;         m -= h;       } else {         xs[u] = i;         u += 1;       }       i += 1;     }     for (int i = 0; i < n; i++) printf( %d  , xs[i] + 1);     printf(  n );     return 0;   }   