Submission #21964825

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Source Code Expand

#include <atcoder/all>
using namespace atcoder;
#include <bits/stdc++.h>
using namespace std;
using ll = long long;
const double pi = 3.14159265359;
const ll INF = 1LL << 60;

int main()
{
  int m, k;
  cin >> m >> k;

  if (m == 0){
    if (k == 0){
      cout << "0 0" << endl;
    } else {
      cout << -1 << endl;
    }
    return 0;
  } else if (m == 1){
    if (k == 0){
      cout << "0 0 1 1" << endl;
    } else {
      cout << -1 << endl;
    }
    return 0;
  }

  if (k >= (1 << m)){
    cout << -1 << endl;
    return 0;
  }

  bool fst = true;
  for (int i = 0; i < (1 << m); i++){
    if (i == k) continue;
    if (fst){ fst = false; }
    else { cout << " "; }
    cout << i;
  }
  cout << " " << k;
  for (int i = (1 << m) - 1; i >= 0; i--){
    if (i == k) continue;
    cout << " " << i;
  }
  cout << " " << k << endl;
  return 0;
}

Submission Info

Judge Result