제출 #220799

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
220799		Haunted_Cpp	Geppetto (COCI15_geppetto)	C++17	80 / 80	7 ms	384 KiB

geppetto

#include <iostream>
#include <algorithm>
#include <cmath>
#include <vector>
#include <set>
#include <map>
#include <unordered_set>
#include <unordered_map>
#include <queue>
#include <cassert>
#include <string>
#include <cstring>
#include <bitset>
#include <random>
#include <chrono>
#include <iomanip>
 
#pragma GCC optimize ("Ofast")
#pragma GCC target("fma,sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,avx2,tune=native")
#pragma GCC optimize("unroll-loops")
 
#define FOR(i, a, b) for(int i = a; i < (int) b; i++)
#define F0R(i, a) FOR (i, 0, a)
#define ROF(i, a, b) for(int i = a; i >= (int) b; i--)
#define R0F(i, a) ROF(i, a, 0)
#define GO(i, a) for (auto i : a)
 
#define rsz resize
#define eb emplace_back
#define pb push_back
#define sz(x) (int) x.size()
#define all(x) x.begin(), x.end()
#define rall(x) x.rbegin(), x.rend()
#define f first
#define s second
 
using namespace std;
 
typedef pair<int, int> pii;
typedef vector<int> vi;
typedef vector<pii> vpii;
typedef vector<vi> vvi;
typedef vector<vpii> vvpii;
typedef long long i64;
typedef vector<i64> vi64;
typedef vector<vi64> vvi64;
typedef pair<i64, i64> pi64;
typedef vector<pi64> vpi64;
 
const int dr[] = {+1, -1, +0, +0, +1, -1, +1, -1};
const int dc[] = {+0, +0, +1, -1, +1, -1, -1, +1};
const int ms[] = {+31, +29, +31, 30, +31, +30, +31, +31, +30, +31, +30, +31};

const int N = 20 + 1;

int n, m;
vvi g (N);

int solve (int p = 0, int mask = 0) {
  if (p >= n) return 1;
  int res = 0;
  res += solve (p + 1, mask);
  GO (to, g[p]) {
    if ((mask >> to) & 1) goto fim;
  }
  res += solve (p + 1, mask | (1 << p));
  fim:;
  return res;
}

int main () {
  ios::sync_with_stdio(0);
  cin.tie(0);
  cin >> n >> m;
  F0R (i, m) {
    int st, et;
    cin >> st >> et;
    --st; --et;
    g[st].eb(et);
    g[et].eb(st);
  }
  cout << solve () << '\n';
  return 0;
}

• Subtask 1: 80 / 80