제출 #569952

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
569952		600Mihnea	Calvinball championship (CEOI15_teams)	C++17	100 / 100	229 ms	420 KiB

teams

#include <bits/stdc++.h>

using namespace std;

const int N = 10000 + 7;
const int M = 1000007;

int n, a[N], mx[N], ways[N];

signed main() {
  ios::sync_with_stdio(0); cin.tie(0);


  cin >> n;
  for (int i = 1; i <= n; i++) {
    cin >> a[i];
    mx[i] = max(mx[i - 1], a[i]);
    ways[i] = 1;
  }

  int sol = 1;
  for (int i = n; i >= 1; i--) {
    sol = (sol + 1LL * (a[i] - 1) * (ways[mx[i - 1]])) % M;
    for (int j = 1; j <= n; j++) {
      ways[j] = (1LL * j * ways[j] + ways[j + 1]) % M;
    }
  }
  cout << sol << "\n";
}

• 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: 10 / 10
• Subtask 9: 10 / 10
• Subtask 10: 10 / 10