oj.uz

답안 #990941

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
990941 2024-05-31T20:42:15 Z vjudge1 캥거루 (CEOI16_kangaroo) C++17
100 / 100
 21 ms 25688 KB 
#include<bits/stdc++.h>
#define int long long
#define _ ios::sync_with_stdio(0),cout.tie(0),cin.tie(0);
using namespace std;
const int N = 2001, M = 1e9 + 7;
int n, a, b, i, j, dp[N][N];
signed main()
{_
    cin >> n >> a >> b;  dp[1][1] = 1;
    for (i = 2; i <= n; i++)
        for (j = 1; j <= i; j++)
            if (i == a || i == b) dp[i][j] = (dp[i - 1][j - 1] + dp[i - 1][j]) % M;
            else dp[i][j] = (dp[i - 1][j + 1] * j + dp[i - 1][j - 1] * (j - (a < i) - (b < i))) % M;
    return cout << dp[n][1], 0;
}

Subtask #1
6.0 / 6.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 1 ms 348 KB Output is correct

Subtask #2
30.0 / 30.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 1 ms 2396 KB Output is correct
4 Correct 1 ms 2396 KB Output is correct
5 Correct 1 ms 2392 KB Output is correct
6 Correct 1 ms 2516 KB Output is correct
7 Correct 1 ms 2516 KB Output is correct
8 Correct 1 ms 2396 KB Output is correct
9 Correct 1 ms 2392 KB Output is correct
10 Correct 1 ms 2396 KB Output is correct
11 Correct 1 ms 2396 KB Output is correct

Subtask #3
15.0 / 15.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 1 ms 2396 KB Output is correct
4 Correct 1 ms 2396 KB Output is correct
5 Correct 1 ms 2392 KB Output is correct
6 Correct 1 ms 2516 KB Output is correct
7 Correct 1 ms 2516 KB Output is correct
8 Correct 1 ms 2396 KB Output is correct
9 Correct 1 ms 2392 KB Output is correct
10 Correct 1 ms 2396 KB Output is correct
11 Correct 1 ms 2396 KB Output is correct
12 Correct 1 ms 2652 KB Output is correct
13 Correct 1 ms 2652 KB Output is correct
14 Correct 1 ms 4444 KB Output is correct
15 Correct 1 ms 2904 KB Output is correct
16 Correct 2 ms 4444 KB Output is correct
17 Correct 1 ms 2772 KB Output is correct
18 Correct 1 ms 2652 KB Output is correct
19 Correct 1 ms 2652 KB Output is correct
20 Correct 1 ms 4440 KB Output is correct

Subtask #4
49.0 / 49.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 1 ms 2396 KB Output is correct
4 Correct 1 ms 2396 KB Output is correct
5 Correct 1 ms 2392 KB Output is correct
6 Correct 1 ms 2516 KB Output is correct
7 Correct 1 ms 2516 KB Output is correct
8 Correct 1 ms 2396 KB Output is correct
9 Correct 1 ms 2392 KB Output is correct
10 Correct 1 ms 2396 KB Output is correct
11 Correct 1 ms 2396 KB Output is correct
12 Correct 1 ms 2652 KB Output is correct
13 Correct 1 ms 2652 KB Output is correct
14 Correct 1 ms 4444 KB Output is correct
15 Correct 1 ms 2904 KB Output is correct
16 Correct 2 ms 4444 KB Output is correct
17 Correct 1 ms 2772 KB Output is correct
18 Correct 1 ms 2652 KB Output is correct
19 Correct 1 ms 2652 KB Output is correct
20 Correct 1 ms 4440 KB Output is correct
21 Correct 3 ms 7512 KB Output is correct
22 Correct 3 ms 7772 KB Output is correct
23 Correct 3 ms 7136 KB Output is correct
24 Correct 21 ms 24444 KB Output is correct
25 Correct 13 ms 25688 KB Output is correct
26 Correct 11 ms 23132 KB Output is correct
27 Correct 12 ms 22880 KB Output is correct
28 Correct 7 ms 15196 KB Output is correct