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Submission #518420

# Submission time Handle Problem Language Result Execution time Memory
518420 2022-01-23T18:54:19 Z blue Calvinball championship (CEOI15_teams) C++17
20 / 100
 313 ms 616 KB 
#include <iostream>
using namespace std;

using ll = long long;
const ll mod = 1'000'007LL;

int main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);

    int n;
    cin >> n;

    ll* ch[1+n];
    ch[0] = new ll[1+n];
    ch[1] = new ll[1+n];
    for(int i = 2; i <= n; i++) ch[i] = ch[i-2];

    for(int i = 0; i <= n; i++) ch[0][i] = ch[1][i] = 0;
    ch[0][0] = 1;

    ll dp[1+n];
    dp[0] = 1;
    for(int i = 1; i <= n; i++)
    {
        dp[i] = 0;
        for(int t = 1; t <= i; t++)
        {
            // dp[i] = (dp[i] + ((dp[i-t] * ch[i-1][t-1]) % mod)) % mod;
            dp[i] = (dp[i] + ((dp[i-t] * ch[i-1][t-1]) % mod)) % mod;
        }

        ch[i][0] = ch[i][i] = 1;
        for(int j = 1; j < i; j++) ch[i][j] = (ch[i-1][j] + ch[i-1][j-1]) % mod;
    }

    cout << dp[n] << '\n';
}

Subtask #1
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 204 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #2
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 204 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 204 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct

Subtask #5
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 204 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #6
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 204 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #7
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 3 ms 332 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #8
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 313 ms 592 KB Output is correct

Subtask #9
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 87 ms 460 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #10
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 296 ms 616 KB Output isn't correct
2 Halted 0 ms 0 KB -