oj.uz

답안 #524525

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
524525 2022-02-09T12:03:11 Z tato Trener (COCI20_trener) C++14
55 / 110
 2000 ms 6264 KB 
#include <bits/stdc++.h>

using namespace std;





long long p = 1e9+7;
map <string, long long > mp;
long long pas = 0;
int n,k;
vector <string > v[51];
long long g[51][1501];
int used[51][1501];
bool check(string s, string l)
{
	
	string t = l.substr(0,l.size() - 1);
	string f = l.substr(1);
	if(s == t or s == f)
		return true;
	else
		return false;
	
}

long long dfs(pair <int,int> par,int m)
{
	if(m == n + 1)
		return 1;
	
	used[par.first][par.second] = 1;
	for(int i = 0; i < k; i++)
	if(check(v[par.first][par.second], v[m][i]))
		{
			long long cnt;
			if(used[m][i] == 1)
				cnt = g[m][i];
			else
			 cnt = dfs({m,i}, m + 1);
			g[par.first][par.second] = (g[par.first][par.second] + cnt) % p;
		}
			
	return  g[par.first][par.second];

	
}

void answer()
{

	string s;
	cin >> n >> k;
	

	
	
	for(int i = 1; i <= n; i++)
		for(int j = 1; j <= k; j++)
			{
				cin >> s;
				v[i].push_back(s);
			}
	for (int i = 0; i < k; i++)
		pas = (dfs({1,i},2) + pas) % p;
	
	cout << pas;
	
	
}


int main()
{
	int t = 1;
	//cin >> t;
	
	while(t--)
		answer();
	
	
	
	
	return 0;
}

Subtask #1
22.0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 332 KB Output is correct
2 Correct 1 ms 332 KB Output is correct
3 Correct 0 ms 332 KB Output is correct
4 Correct 0 ms 332 KB Output is correct

Subtask #2
33.0 / 33.0

# 결과 실행 시간 메모리 Grader output
1 Correct 49 ms 1128 KB Output is correct
2 Correct 66 ms 1128 KB Output is correct
3 Correct 52 ms 1120 KB Output is correct
4 Correct 52 ms 1036 KB Output is correct
5 Correct 50 ms 1100 KB Output is correct
6 Correct 51 ms 1100 KB Output is correct
7 Correct 52 ms 1064 KB Output is correct

Subtask #3
0 / 55.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 332 KB Output is correct
2 Correct 1 ms 332 KB Output is correct
3 Correct 0 ms 332 KB Output is correct
4 Correct 0 ms 332 KB Output is correct
5 Correct 49 ms 1128 KB Output is correct
6 Correct 66 ms 1128 KB Output is correct
7 Correct 52 ms 1120 KB Output is correct
8 Correct 52 ms 1036 KB Output is correct
9 Correct 50 ms 1100 KB Output is correct
10 Correct 51 ms 1100 KB Output is correct
11 Correct 52 ms 1064 KB Output is correct
12 Execution timed out 2062 ms 6264 KB Time limit exceeded
13 Halted 0 ms 0 KB -