Submission #518420

#	Time	Username	Problem	Language	Result	Execution time	Memory
518420		blue	Calvinball championship (CEOI15_teams)	C++17	20 / 100	313 ms	616 KiB

teams

#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
• Subtask 2: 0 / 10
• Subtask 3: 0 / 10
• Subtask 4: 10 / 10
• Subtask 5: 0 / 10
• Subtask 6: 0 / 10
• Subtask 7: 0 / 10
• Subtask 8: 10 / 10
• Subtask 9: 0 / 10
• Subtask 10: 0 / 10