제출 #945556

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
945556		Minbaev	Cubeword (CEOI19_cubeword)	C++17	0 / 100	163 ms	344 KiB

cubeword

#include <bits/stdc++.h>

using namespace std;

#define int long long
#define all(x) x.begin(),x.end()
#define pb push_back

const int N=1e6 + 5	;
const int inf = 1e18 + 7;
const int mod = 998244353;

int g[11][25][25];
int ans = 0;
int n,m,k;

vector<int>vs;

void dfs(int i){
	
	if(i == 4){
		
		for(int sz = 3;sz<=10;sz++){
			int val = 1;
				for(int j = 0;j<4;j++){
					int sum = 0; 
					for(int k = 0;k<='p'-'a';k++){
						int c = 1;
						
						for(int l = 0;l<4;l++){
							if(l == j)continue;
							c *= g[sz][vs[l]][k];
						}
						sum += c;
						sum %= mod;
					}
					val *= sum;
					val %= mod;
				}
			ans += val;
			ans %= mod;
		}
		return;
	}
	
	for(int l = 0;l<='p'-'a';l++){
		vs.pb(l);
		dfs(i + 1);
		vs.pop_back();
	}
	
}


void solve(){
	
	cin >> n;
	
	for(int i = 1;i<=n;i++){
		string a;
		cin >> a;
		string b = a;
		g[a.size()][a[0]-'a'][a[a.size()-1]-'a'] += 1;
		reverse(all(a));
		if(a != b){
			g[a.size()][a[0]-'a'][a[a.size()-1]-'a'] += 1;
		}
	}
	
	dfs(0);
	cout << ans << '\n';
	
}
/*

*/
signed main()
{
	ios_base::sync_with_stdio(0);cin.tie(NULL);cout.tie(NULL);
	int tt=1;//cin>>tt>>n;
	while(tt--)solve();

}

• Subtask 1: 0 / 21
• Subtask 2: 0 / 29
• Subtask 3: 0 / 34
• Subtask 4: 0 / 16