Submission #960983

#	Time	Username	Problem	Language	Result	Execution time	Memory
960983		Pety	Hiperkocka (COCI21_hiperkocka)	C++14	0 / 110	1 ms	348 KiB

Main

#include <bits/stdc++.h>
 
using namespace std;
 
const int N = 1e6+2;
const int mod = 1e9 + 7;

int n;
vector<pair<int, int>>G[20];
vector<int>ans;

void dfs (int nod, int val, int par) {
  ans.push_back(val);
  for (auto it : G[nod]) {
    if (it.first == par) continue;
    dfs(it.first, val ^ (1 << it.second), nod);
  }
}

int main () 
{
  ios_base::sync_with_stdio(false);
  cin.tie(0); cout.tie(0);
  cin >> n;
  for (int i = 0; i < n; i++) {
    int x, y;
    cin >> x >> y;
    G[x].push_back({y, i});
    G[y].push_back({x, i});
  }
  dfs(0, 0, 0);
  cout << (1 << (n - 1)) << "\n";
  for (int i = 0; i < (1 << n); i++)
    if (__builtin_popcount(i) % 2 == 0) {
      for (auto it : ans)
        cout << (i ^ it) << " ";
      cout << "\n";
    }
  return 0;
}

• Subtask 1: 0 / 110