Submission #1086448

#	Time	Username	Problem	Language	Result	Execution time	Memory
1086448		juicy	Calvinball championship (CEOI15_teams)	C++17	100 / 100	211 ms	856 KiB

teams

#include <bits/stdc++.h>

using namespace std;

#ifdef LOCAL
#include "debug.h"
#else
#define debug(...) 42
#endif

const int N = 10005, M = 1000007;

void add(int &x, int y) {
  if ((x += y) >= M) {
    x -= M;
  }
}

int n;
int a[N], ma[N], dp[N];

int main() {
  ios::sync_with_stdio(false); cin.tie(nullptr);

  cin >> n;
  for (int i = 1; i <= n; ++i) {
    cin >> a[i];
    ma[i] = max(ma[i - 1], a[i - 1]);
  }
  fill(dp + 1, dp + n + 1, 1);
  int res = 1;
  for (int i = n; i >= 1; --i) {
    add(res, (long long) dp[ma[i]] * (a[i] - 1) % M);
    for (int j = 1; j <= n; ++j) {
      dp[j] = (long long) dp[j] * j % M;
      add(dp[j], dp[j + 1]);
    } 
  }
  cout << res;
  return 0;
}

• 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