Submission #1251500

#	Time	Username	Problem	Language	Result	Execution time	Memory
1251500		chikien2009	Calvinball championship (CEOI15_teams)	C++20	10 / 100	241 ms	560 KiB

teams

#include <bits/stdc++.h>

using namespace std;

void setup()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
}

const int mod = 1000007;
int n, f[10002], g[10002], a[10002], res = 1;

int main()
{
    setup();

    cin >> n;
    for (int i = 1; i <= n; ++i)
    {
        cin >> a[i];
    }
    reverse(a + 1, a + 1 + n);
    fill_n(f, n + 2, 1);
    for (int i = 1; i <= n; ++i)
    {
        for (int j = 1; j <= n - i + 1; ++j)
        {
            g[j] = (f[j + 1] + g[j - 1]) % mod;
        }
        (res += g[a[i] - 1]) %= mod;
        for (int j = 1; j <= n; ++j)
        {
            f[j] = g[j];
        }
    }
    cout << res;
    return 0;
}

• Subtask 1: 10 / 10
• Subtask 2: 0 / 10
• Subtask 3: 0 / 10
• Subtask 4: 0 / 10
• Subtask 5: 0 / 10
• Subtask 6: 0 / 10
• Subtask 7: 0 / 10
• Subtask 8: 0 / 10
• Subtask 9: 0 / 10
• Subtask 10: 0 / 10