제출 #747689

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
747689		Trisanu_Das	Calvinball championship (CEOI15_teams)	C++17	0 / 100	382 ms	428 KiB

teams

#include <bits/stdc++.h>
using namespace std;
const int MOD = 1e6 + 7;
 
int main() {
    int n, mx = 0; cin >> n;
    int dp[n], a[n];
    for (int i = 0; i < n; i++) cin >> a[i];
    for (int i = 0; i < n; i++) {
        for (int j = n; j >= 2; j--) dp[j] = (1ll * dp[j] * j % MOD + dp[j - 1]) % MOD;
        dp[mx] = (dp[mx] + a[i] - 1) % MOD, mx = max(mx, a[i]);
    }
    int ans = 0;
    for (int i = 1; i <= n; i++) ans = (ans + dp[i]) % MOD;
    cout << ans + 1 << "\n";
}

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