Submission #527140

#	Time	Username	Problem	Language	Result	Execution time	Memory
527140		joelau	Calvinball championship (CEOI15_teams)	C++14	0 / 100	1 ms	844 KiB

teams

#include <bits/stdc++.h>
using namespace std;

long long N, A[105], dp[1005][1005], p = 1000007;

int main() {
    ios_base::sync_with_stdio(false); cin.tie(NULL);
    cin >> N;
    for (long long i = 0; i < N; ++i) {
        cin >> A[i]; A[i]--;
    }
    for (long long i = 0; i < N; ++i) dp[N][i] = 1;
    for (long long i = N-1; i >= 0; --i) for (long long j = 0; j < N; ++j) dp[i][j] = (dp[i+1][j] * j + dp[i+1][j+1]) % p;
    long long ans = 0, most = 0;
    for (long long i = 0; i < N; ++i) {
        for (long long j = 0; j < A[i]; ++j) ans += dp[i][max(most,j)];
        most = max(most,A[i]);
    }
    cout << ans;

    return 0;
}

• Subtask 1: 0 / 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