제출 #440799

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
440799		hhhhaura	Amusement Park (CEOI19_amusementpark)	C++14	19 / 100	3039 ms	316 KiB

amusementpark

#define wiwihorz
#include <bits/stdc++.h>
#pragma GCC optimize("Ofast")
#pragma loop-opt(on)

#define rep(i, a, b) for(int i = a; i <= b; i++)
#define rrep(i, a, b) for(int i = b; i >= a; i--)
#define all(x) x.begin(), x.end()
#define ceil(a, b) ((a + b - 1) / (b))

#define INF 1000000000000000000
#define MOD 998244353
#define eps (1e-9)

using namespace std;

#define int long long int
#define lld long double
#define pii pair<int, int>
#define random mt19937 rnd(chrono::steady_clock::now().time_since_epoch().count())

#ifdef wiwihorz
#define print(a...) kout("[" + string(#a) + "] = ", a)
void vprint(auto L, auto R) {while(L < R) cerr << *L << " \n"[next(L) == R], ++L;}
void kout() { cerr << endl; }
template<class T1, class ... T2> void kout(T1 a, T2 ... e) { cerr << a << " ", kout(e...); }
#else
#define print(...) 0
#define vprint(...) 0
#endif
namespace solver {
	int n, m, cur;
	vector<vector<int>> mp;
	vector<int> x, y, es, vis;
	void init_(int _n, int _m) {
		n = _n, m = _m;
		mp.assign(n + 1, vector<int>());
		x.clear();
		y.clear();
		es.clear();
	}
	void add_edge(int a, int b) {
		mp[a].push_back(es.size());
		mp[b].push_back(es.size());
		x.push_back(a);
		y.push_back(b);
		es.push_back(a ^ b);
	}
	pii get(int id) {
		bool yes = (cur >> id) & 1;
		if(yes) return {y[id], x[id]};
		else return {x[id], y[id]};
	}
	int solve() {
		int ans = 0, ok = 0;
		rep(i, 0, (1 << m) - 1) {
			cur = i, ok = 0;
			vis.assign(n + 1, 0);
			rep(j, 0, m - 1) {
				pii es = get(j);
				vis[es.second] ++;
			}
			queue<int> q;
			rep(j, 1, n) if(!vis[j]) q.push(j);
			while(q.size()) {
				int p = q.front(); q.pop();
				ok ++;
				for(auto i : mp[p]) {
					int to = es[i] ^ p;
					if(get(i) == pii(p, to)) {
						vis[to] --;
						if(!vis[to]) q.push(to);
					}
				}
			}
			if(ok == n) ans = (ans + __builtin_popcount(i)) % MOD;
		}
		return ans;
	} 

};
using namespace solver;
signed main() {
	ios::sync_with_stdio(false), cin.tie(0);
	int n, m; cin >> n >> m;
	init_(n, m);
	rep(i, 1, m) {
		int a, b; cin >> a >> b;
		add_edge(a, b);
	}
	cout << solve() << "\n";
	return 0;	
}

컴파일 시 표준 에러 (stderr) 메시지

amusementpark.cpp:4: warning: ignoring '#pragma loop ' [-Wunknown-pragmas]
    4 | #pragma loop-opt(on)
      | 
amusementpark.cpp:24:13: warning: use of 'auto' in parameter declaration only available with '-fconcepts-ts'
   24 | void vprint(auto L, auto R) {while(L < R) cerr << *L << " \n"[next(L) == R], ++L;}
      |             ^~~~
amusementpark.cpp:24:21: warning: use of 'auto' in parameter declaration only available with '-fconcepts-ts'
   24 | void vprint(auto L, auto R) {while(L < R) cerr << *L << " \n"[next(L) == R], ++L;}
      |                     ^~~~

• Subtask 1: 7 / 7
• Subtask 2: 12 / 12
• Subtask 3: 0 / 23
• Subtask 4: 0 / 21
• Subtask 5: 0 / 37