제출 #1119568

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1119568		Minbaev	PIN (CEOI10_pin)	C++17	100 / 100	315 ms	16656 KiB

pin

#include <bits/stdc++.h>
 
#pragma GCC target("avx,avx2,fma")
#pragma GCC optimize("Ofast,unroll-loops")
 
using namespace std;

 
int n,m,k,q;
map<vector<char>, int>mp[(1<<4)];

void solve(){
 
	cin >> n >> k;
	vector<string>v(n);
	vector<int>ans(4);
	for(auto &to:v)cin >> to;
	
	for(int i = 0;i<n;i++){
		for(int mask = 0;mask<(1<<4)-1;mask++){
			int cnt = 0;
			vector<char>vs;
			for(int j = 0;j<4;j++){
				if(mask >> j & 1){
					cnt += 1;
					vs.push_back(v[i][j]);
				}
			}
			ans[3-cnt] += mp[mask][vs];
			mp[mask][vs] += 1;
		}
	}
	
	ans[1] -= ans[0]*3;
	ans[2] -= ans[1]*2+ans[0]*3;
	ans[3] -= ans[0]+ans[1]+ans[2];
	cout << ans[k-1] << "\n";
	
	
	
	
	
	
	
	
 	
 	
 	
 	
 	
 	
}
/*
 
*/
 signed main()
{
//	freopen("seq.in", "r", stdin);
//  freopen("seq.out", "w", stdout);
	ios_base::sync_with_stdio(0);cin.tie(NULL);cout.tie(NULL);
	int tt=1;//cin>>tt;
	while(tt--)solve();
 
}

• Subtask 1: 100 / 100