제출 #1121667

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1121667		vjudge1	Calvinball championship (CEOI15_teams)	C++17	0 / 100	86 ms	696 KiB

teams

#include <bits/stdc++.h>
#define all(v) v.begin(), v.end()
#define int long long
using namespace std;

const int sz = 1e4 + 5, mod = 1e9 + 7;
int n, a[sz], mx[sz], dp[2][sz];

signed main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    
    cin >> n;
    for(int i = 1; i <= n; i++) 
    {
        cin >> a[i];
        mx[i] = max(mx[i], a[i]);
    }
    
    int ans = 1;
    dp[0][0] = 1;
    for(int i = 1, cur = 1; i <= n; i++, cur ^= 1)
    {
        for(int j = 1; j <= i; j++)
        {
            dp[cur][j] = (dp[cur ^ 1][j - 1] + dp[cur ^ 1][j] * j) % mod;
        }
        ans = (ans + dp[cur ^ 1][mx[i - 1]] * (a[i] - 1)) % mod;
    }
    cout << ans;
}  

• 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