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Submission #954790

# Submission time Handle Problem Language Result Execution time Memory
954790 2024-03-28T14:33:20 Z DragosC1 Kangaroo (CEOI16_kangaroo) C++17
0 / 100
 0 ms 344 KB 
#include <bits/stdc++.h>
using namespace std;

const int MOD = 1000000007;

int dp[2005][2005];

int main() {    
    ifstream f("kangaroo.in");
    int n, start, finish;
    f >> n >> start >> finish;
    f.close();
    dp[0][0] = 1;
    for (int i = 1; i <= n; i++)
        for (int j = 1; j <= n; j++) {
            if (i == start || i == finish) 
                dp[i][j] = (1LL * dp[i][j] + dp[i - 1][j] + dp[i - 1][j - 1]) % MOD;
            else {
                dp[i][j] = (1LL * dp[i][j] + 1LL * j * dp[i - 1][j - 1] % MOD) % MOD;
                dp[i][j] = (1LL * dp[i][j] + 1LL * j * dp[i - 1][j + 1] % MOD) % MOD;
            }
        }
    ofstream g("kangaroo.out");
    g << dp[n][1] << '\n';
    g.close();
    return 0;
}

Subtask #1
0 / 6.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 344 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #2
0 / 30.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 344 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
0 / 15.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 344 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 49.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 344 KB Output isn't correct
2 Halted 0 ms 0 KB -