제출 #81968

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
81968		Saboon	Calvinball championship (CEOI15_teams)	C++14	70 / 100	42 ms	16800 KiB

teams

#include <bits/stdc++.h>
#define F first
#define S second
#define PB push_back
#define PF push_front
#define MP make_pair
using namespace std;
typedef long long ll;
typedef long double ld;
typedef pair<int,int> pii;
const int maxn = 1e3 + 10;
const int mod = 1e6 + 7;
 
ll dp[maxn][maxn], par[maxn], a[maxn];
 
int main() {
	int n;
	cin >> n;
	for (int i = 1; i <= n; i++) {
		cin >> a[i];
		par[i] = max (par[i - 1], a[i]);
	}
 
	for (int i = 1; i <= n; i++)
		dp[0][i] = 1;
	for (int i = 1; i <= n; i++) {
		for (int j = 1; j <= n; j++) {
			dp[i][j] = (1ll * j * dp[i - 1][j] + dp[i - 1][j + 1]) % mod;
		}
	}
	ll ans = 0;
	for (int i = 1; i <= n; i++) {
		ans = (ans + 1ll * (a[i] - 1) * dp[n - i][par[i - 1]] % mod);
	}
	cout << (ans + 1) % mod << endl;
}

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