답안 #443571

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
443571	2021-07-10T20:51:13 Z	keta_tsimakuridze	캥거루 (CEOI16_kangaroo)	C++14	100 / 100	22 ms	24000 KB

kangaroo

#include<bits/stdc++.h>
#define f first
#define s second
#define int long long
using namespace std;
const int N=5005,mod=1e9+7;
int t,n,st,en,dp[N][N];
main(){
	cin>>n>>st>>en;
	dp[1][1] = 1;
	for(int i=2;i<=n;i++) {
		for(int j=1;j<=i;j++) {
			if(i==st || i==en) {
				dp[i][j] = (dp[i-1][j-1] + dp[i-1][j])%mod; 
			}
			else {
				dp[i][j] = (dp[i-1][j+1]*j%mod + dp[i-1][j-1] * (j - (st<i) - (en<i))%mod)%mod;
			}
		}
	}
	cout<<dp[n][1];
}

Compilation message

kangaroo.cpp:8:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
    8 | main(){
      | ^~~~

Subtask #1

6.0 / 6.0

#	결과	실행 시간	메모리	Grader output
1	Correct	0 ms	204 KB	Output is correct
2	Correct	1 ms	332 KB	Output is correct

Subtask #2

30.0 / 30.0

#	결과	실행 시간	메모리	Grader output
1	Correct	0 ms	204 KB	Output is correct
2	Correct	1 ms	332 KB	Output is correct
3	Correct	1 ms	332 KB	Output is correct
4	Correct	1 ms	460 KB	Output is correct
5	Correct	1 ms	460 KB	Output is correct
6	Correct	0 ms	460 KB	Output is correct
7	Correct	0 ms	460 KB	Output is correct
8	Correct	0 ms	460 KB	Output is correct
9	Correct	0 ms	460 KB	Output is correct
10	Correct	1 ms	460 KB	Output is correct
11	Correct	1 ms	460 KB	Output is correct

Subtask #3

15.0 / 15.0

#	결과	실행 시간	메모리	Grader output
1	Correct	0 ms	204 KB	Output is correct
2	Correct	1 ms	332 KB	Output is correct
3	Correct	1 ms	332 KB	Output is correct
4	Correct	1 ms	460 KB	Output is correct
5	Correct	1 ms	460 KB	Output is correct
6	Correct	0 ms	460 KB	Output is correct
7	Correct	0 ms	460 KB	Output is correct
8	Correct	0 ms	460 KB	Output is correct
9	Correct	0 ms	460 KB	Output is correct
10	Correct	1 ms	460 KB	Output is correct
11	Correct	1 ms	460 KB	Output is correct
12	Correct	1 ms	1228 KB	Output is correct
13	Correct	1 ms	1100 KB	Output is correct
14	Correct	1 ms	1228 KB	Output is correct
15	Correct	1 ms	1228 KB	Output is correct
16	Correct	1 ms	1228 KB	Output is correct
17	Correct	1 ms	1268 KB	Output is correct
18	Correct	1 ms	1100 KB	Output is correct
19	Correct	1 ms	1228 KB	Output is correct
20	Correct	1 ms	1228 KB	Output is correct

Subtask #4

49.0 / 49.0

#	결과	실행 시간	메모리	Grader output
1	Correct	0 ms	204 KB	Output is correct
2	Correct	1 ms	332 KB	Output is correct
3	Correct	1 ms	332 KB	Output is correct
4	Correct	1 ms	460 KB	Output is correct
5	Correct	1 ms	460 KB	Output is correct
6	Correct	0 ms	460 KB	Output is correct
7	Correct	0 ms	460 KB	Output is correct
8	Correct	0 ms	460 KB	Output is correct
9	Correct	0 ms	460 KB	Output is correct
10	Correct	1 ms	460 KB	Output is correct
11	Correct	1 ms	460 KB	Output is correct
12	Correct	1 ms	1228 KB	Output is correct
13	Correct	1 ms	1100 KB	Output is correct
14	Correct	1 ms	1228 KB	Output is correct
15	Correct	1 ms	1228 KB	Output is correct
16	Correct	1 ms	1228 KB	Output is correct
17	Correct	1 ms	1268 KB	Output is correct
18	Correct	1 ms	1100 KB	Output is correct
19	Correct	1 ms	1228 KB	Output is correct
20	Correct	1 ms	1228 KB	Output is correct
21	Correct	4 ms	4556 KB	Output is correct
22	Correct	4 ms	4940 KB	Output is correct
23	Correct	4 ms	5580 KB	Output is correct
24	Correct	21 ms	23964 KB	Output is correct
25	Correct	22 ms	23980 KB	Output is correct
26	Correct	21 ms	24000 KB	Output is correct
27	Correct	21 ms	23812 KB	Output is correct
28	Correct	13 ms	15052 KB	Output is correct