제출 #1279616

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1279616		DanielPr8	Amusement Park (CEOI19_amusementpark)	C++20	0 / 100	1 ms	572 KiB

amusementpark

#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using vll = vector<ll>;
using vvl = vector<vll>;
using pll = pair<ll,ll>;

#define f first
#define s second
#define pb push_back
#define all(v) v.begin(),v.end()
const int mod =  998244353;
int main(){
    ios_base::sync_with_stdio(0);cin.tie(NULL);
    ll n, m;
    cin >> n >> m;
    vvl g(n);
    for(ll a,b,i = 0; i < m; ++i){
        cin >> a >> b;
        g[--a].pb(--b);
    }
    vll dp(1<<n);
    vll fac(n+1, 1);
    for(ll i = 1; i <= n; ++i)fac[i]=(fac[i-1]*i)%mod;
    for(ll i = 1; i < (1<<n); ++i){
        ll mul = fac[__builtin_popcount(i)-1];
        for(ll j = 0; j < n; ++j){
            if(!(i & (1<<j)))continue;
            dp[i] += dp[i^(1<<j)];
            dp[i] %= mod;
            for(ll x:g[j]){
                if(i&(1<<x))dp[i]+=mul;
            }
            dp[i]%=mod;
        }
    }
    cout << dp.back();
}

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