oj.uz

답안 #740616

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
740616 2023-05-12T20:08:40 Z MladenP 캥거루 (CEOI16_kangaroo) C++17
100 / 100
 17 ms 22996 KB 
#include <iostream>
#define MAXN 2010
#define MOD 1000000007
using namespace std;
long long dp[MAXN][MAXN];
int main() {
    ios::sync_with_stdio(false); cin.tie(0);
    long long n, cs, cf;
    cin >> n >> cs >> cf; 
    dp[1][1] = 1;
    for (int i = 2; i <= n; i++) {
        for (long long j = 1; j <= i; j++) {
            if (i == cs || i == cf) {
                dp[i][j] = dp[i-1][j-1] + dp[i-1][j];
                if (dp[i][j] >= MOD) dp[i][j] %= MOD;
            } else {
                dp[i][j] = j * dp[i-1][j+1];
                dp[i][j] += (j - (cs < i) - (cf < i)) * dp[i-1][j-1];
                if (dp[i][j] >= MOD) dp[i][j] %= MOD;
            }
        }
    }
    cout << dp[n][1];
    return 0;
}

Subtask #1
6.0 / 6.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 0 ms 340 KB Output is correct

Subtask #2
30.0 / 30.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 1 ms 328 KB Output is correct
4 Correct 1 ms 468 KB Output is correct
5 Correct 1 ms 468 KB Output is correct
6 Correct 1 ms 468 KB Output is correct
7 Correct 1 ms 468 KB Output is correct
8 Correct 1 ms 452 KB Output is correct
9 Correct 1 ms 468 KB Output is correct
10 Correct 1 ms 468 KB Output is correct
11 Correct 1 ms 468 KB Output is correct

Subtask #3
15.0 / 15.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 1 ms 328 KB Output is correct
4 Correct 1 ms 468 KB Output is correct
5 Correct 1 ms 468 KB Output is correct
6 Correct 1 ms 468 KB Output is correct
7 Correct 1 ms 468 KB Output is correct
8 Correct 1 ms 452 KB Output is correct
9 Correct 1 ms 468 KB Output is correct
10 Correct 1 ms 468 KB Output is correct
11 Correct 1 ms 468 KB Output is correct
12 Correct 1 ms 1236 KB Output is correct
13 Correct 1 ms 1108 KB Output is correct
14 Correct 1 ms 1236 KB Output is correct
15 Correct 1 ms 1236 KB Output is correct
16 Correct 1 ms 1236 KB Output is correct
17 Correct 1 ms 1236 KB Output is correct
18 Correct 1 ms 1108 KB Output is correct
19 Correct 1 ms 1236 KB Output is correct
20 Correct 1 ms 1236 KB Output is correct

Subtask #4
49.0 / 49.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 1 ms 328 KB Output is correct
4 Correct 1 ms 468 KB Output is correct
5 Correct 1 ms 468 KB Output is correct
6 Correct 1 ms 468 KB Output is correct
7 Correct 1 ms 468 KB Output is correct
8 Correct 1 ms 452 KB Output is correct
9 Correct 1 ms 468 KB Output is correct
10 Correct 1 ms 468 KB Output is correct
11 Correct 1 ms 468 KB Output is correct
12 Correct 1 ms 1236 KB Output is correct
13 Correct 1 ms 1108 KB Output is correct
14 Correct 1 ms 1236 KB Output is correct
15 Correct 1 ms 1236 KB Output is correct
16 Correct 1 ms 1236 KB Output is correct
17 Correct 1 ms 1236 KB Output is correct
18 Correct 1 ms 1108 KB Output is correct
19 Correct 1 ms 1236 KB Output is correct
20 Correct 1 ms 1236 KB Output is correct
21 Correct 3 ms 4564 KB Output is correct
22 Correct 5 ms 4948 KB Output is correct
23 Correct 3 ms 5572 KB Output is correct
24 Correct 17 ms 22984 KB Output is correct
25 Correct 15 ms 22996 KB Output is correct
26 Correct 15 ms 22984 KB Output is correct
27 Correct 15 ms 22868 KB Output is correct
28 Correct 10 ms 15060 KB Output is correct