Submission #1013878

#	Time	Username	Problem	Language	Result	Execution time	Memory
1013878		May27_th	Geppetto (COCI15_geppetto)	C++17	80 / 80	73 ms	440 KiB

geppetto

#include<bits/stdc++.h>
using namespace std;
#define i64 long long
#define i128 __int128
#define mp make_pair
#define pb push_back
#define all(x) (x).begin(), (x).end()
signed main() {
  ios_base::sync_with_stdio(false); cin.tie(0);
  cout << fixed << setprecision(10);
  int Tests = 1; // cin >> Tests;
  while (Tests --) {
    int N, M; cin >> N >> M;
    vector<vector<bool>> works(N + 2, vector<bool> (N + 2, true));
    for (int i = 1; i <= M; i ++) {
      int u, v; cin >> u >> v;
      works[u][v] = works[v][u] = false;
    }
    int ans = 0;
    auto recur = [&](auto &&self, int last, vector<bool> can) -> void {
      ans ++;
      for (int i = last + 1; i <= N; i ++) {
        if (can[i]) {
          vector<bool> ncan = can;
          for (int j = i; j <= N; j ++) {
            if (!works[i][j]) ncan[j] = false;
          }
          self(self, i, ncan);
        }
      }
    }; 
    vector<bool> can(N + 2, true);
    recur(recur, 0, can);
    cout << ans << "\n";
  }
}

• Subtask 1: 80 / 80