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답안 #225470

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
225470 2020-04-20T15:33:13 Z brcode 캥거루 (CEOI16_kangaroo) C++14
100 / 100
 38 ms 39680 KB 
#include <iostream>
#include <bits/stdc++.h>

using namespace std;
const int MAXN = 5e3+5;
const long long MOD = 1e9+7;
long long dp[MAXN][MAXN];
int n,a,b;
int main(){
    cin>>n>>a>>b;
    for(int i=1;i<=n;i++){
        for(int j=1;j<=n;j++){
            if(i==1 && j==1){
                dp[i][j] = 1;
                continue;
            }
            if(i==a||i==b){
                dp[i][j] = dp[i-1][j-1]+dp[i-1][j];
                dp[i][j]%=MOD;
            }else{
                dp[i][j] = dp[i-1][j+1]*j;
                dp[i][j]%=MOD;
                dp[i][j]+=dp[i-1][j-1]*(j-(i>a)-(i>b));
                dp[i][j]%=MOD;
            }
        }
    }
    cout<<dp[n][1]<<endl;
}

Subtask #1
6.0 / 6.0

# 결과 실행 시간 메모리 Grader output
1 Correct 5 ms 384 KB Output is correct
2 Correct 5 ms 384 KB Output is correct

Subtask #2
30.0 / 30.0

# 결과 실행 시간 메모리 Grader output
1 Correct 5 ms 384 KB Output is correct
2 Correct 5 ms 384 KB Output is correct
3 Correct 5 ms 384 KB Output is correct
4 Correct 5 ms 512 KB Output is correct
5 Correct 5 ms 512 KB Output is correct
6 Correct 5 ms 512 KB Output is correct
7 Correct 5 ms 512 KB Output is correct
8 Correct 5 ms 512 KB Output is correct
9 Correct 5 ms 512 KB Output is correct
10 Correct 4 ms 512 KB Output is correct
11 Correct 5 ms 512 KB Output is correct

Subtask #3
15.0 / 15.0

# 결과 실행 시간 메모리 Grader output
1 Correct 5 ms 384 KB Output is correct
2 Correct 5 ms 384 KB Output is correct
3 Correct 5 ms 384 KB Output is correct
4 Correct 5 ms 512 KB Output is correct
5 Correct 5 ms 512 KB Output is correct
6 Correct 5 ms 512 KB Output is correct
7 Correct 5 ms 512 KB Output is correct
8 Correct 5 ms 512 KB Output is correct
9 Correct 5 ms 512 KB Output is correct
10 Correct 4 ms 512 KB Output is correct
11 Correct 5 ms 512 KB Output is correct
12 Correct 5 ms 1408 KB Output is correct
13 Correct 6 ms 1408 KB Output is correct
14 Correct 5 ms 1408 KB Output is correct
15 Correct 6 ms 1408 KB Output is correct
16 Correct 5 ms 1536 KB Output is correct
17 Correct 5 ms 1408 KB Output is correct
18 Correct 5 ms 1280 KB Output is correct
19 Correct 5 ms 1408 KB Output is correct
20 Correct 5 ms 1408 KB Output is correct

Subtask #4
49.0 / 49.0

# 결과 실행 시간 메모리 Grader output
1 Correct 5 ms 384 KB Output is correct
2 Correct 5 ms 384 KB Output is correct
3 Correct 5 ms 384 KB Output is correct
4 Correct 5 ms 512 KB Output is correct
5 Correct 5 ms 512 KB Output is correct
6 Correct 5 ms 512 KB Output is correct
7 Correct 5 ms 512 KB Output is correct
8 Correct 5 ms 512 KB Output is correct
9 Correct 5 ms 512 KB Output is correct
10 Correct 4 ms 512 KB Output is correct
11 Correct 5 ms 512 KB Output is correct
12 Correct 5 ms 1408 KB Output is correct
13 Correct 6 ms 1408 KB Output is correct
14 Correct 5 ms 1408 KB Output is correct
15 Correct 6 ms 1408 KB Output is correct
16 Correct 5 ms 1536 KB Output is correct
17 Correct 5 ms 1408 KB Output is correct
18 Correct 5 ms 1280 KB Output is correct
19 Correct 5 ms 1408 KB Output is correct
20 Correct 5 ms 1408 KB Output is correct
21 Correct 9 ms 6400 KB Output is correct
22 Correct 10 ms 7040 KB Output is correct
23 Correct 10 ms 7808 KB Output is correct
24 Correct 38 ms 39672 KB Output is correct
25 Correct 38 ms 39672 KB Output is correct
26 Correct 37 ms 39680 KB Output is correct
27 Correct 38 ms 39416 KB Output is correct
28 Correct 26 ms 23928 KB Output is correct