답안 #464066

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
464066	2021-08-12T10:33:41 Z	Jasiekstrz	Trener (COCI20_trener)	C++17	110 / 110	189 ms	18140 KB

trener

#include<bits/stdc++.h>
#define fi first
#define se second
using namespace std;
const int MOD=1e9+7;
map<string,int> dp;
int main()
{
	ios_base::sync_with_stdio(false);
	cin.tie(NULL);
	cout.tie(NULL);
	int n,k;
	cin>>n>>k;
	long long ans=0;
	dp[""]=1;
	for(int i=1;i<=n;i++)
	{
		for(int j=1;j<=k;j++)
		{
			string s;
			cin>>s;
			if(i==n)
				ans=(ans-dp[s])%MOD;
			string s1=s,s2=s;
			s1.pop_back();
			s2.erase(s2.begin());
			dp[s]=((long long)dp[s]+dp[s1]+(s1!=s2)*dp[s2])%MOD;
			if(i==n)
				ans=(ans+dp[s])%MOD;
		}
	}
	cout<<(ans+MOD)%MOD<<"\n";
	return 0;
}

Subtask #1

22.0 / 22.0

#	결과	실행 시간	메모리	Grader output
1	Correct	0 ms	204 KB	Output is correct
2	Correct	0 ms	204 KB	Output is correct
3	Correct	0 ms	204 KB	Output is correct
4	Correct	0 ms	204 KB	Output is correct

Subtask #2

33.0 / 33.0

#	결과	실행 시간	메모리	Grader output
1	Correct	9 ms	1356 KB	Output is correct
2	Correct	10 ms	1332 KB	Output is correct
3	Correct	9 ms	1304 KB	Output is correct
4	Correct	2 ms	312 KB	Output is correct
5	Correct	8 ms	1100 KB	Output is correct
6	Correct	8 ms	1100 KB	Output is correct
7	Correct	3 ms	332 KB	Output is correct

Subtask #3

55.0 / 55.0

#	결과	실행 시간	메모리	Grader output
1	Correct	0 ms	204 KB	Output is correct
2	Correct	0 ms	204 KB	Output is correct
3	Correct	0 ms	204 KB	Output is correct
4	Correct	0 ms	204 KB	Output is correct
5	Correct	9 ms	1356 KB	Output is correct
6	Correct	10 ms	1332 KB	Output is correct
7	Correct	9 ms	1304 KB	Output is correct
8	Correct	2 ms	312 KB	Output is correct
9	Correct	8 ms	1100 KB	Output is correct
10	Correct	8 ms	1100 KB	Output is correct
11	Correct	3 ms	332 KB	Output is correct
12	Correct	175 ms	18088 KB	Output is correct
13	Correct	174 ms	18104 KB	Output is correct
14	Correct	189 ms	18124 KB	Output is correct
15	Correct	184 ms	18140 KB	Output is correct
16	Correct	32 ms	2244 KB	Output is correct
17	Correct	140 ms	12736 KB	Output is correct
18	Correct	144 ms	12944 KB	Output is correct
19	Correct	142 ms	12828 KB	Output is correct
20	Correct	143 ms	12928 KB	Output is correct
21	Correct	141 ms	12864 KB	Output is correct
22	Correct	37 ms	2336 KB	Output is correct