Submission #1121786

#	Time	Username	Problem	Language	Result	Execution time	Memory
1121786		aykhn	Calvinball championship (CEOI15_teams)	C++17	100 / 100	173 ms	860 KiB

teams

#include <bits/stdc++.h>

using namespace std;

#define int long long
#define inf 0x3F3F3F3F

const int B = 1e2 + 5;
const int MXN = 1e4 + 5;
const int mod = 1e6 + 7;

int dp[B][MXN];
int bl[B][MXN];
int cur[MXN], nw[MXN];

signed main()
{
  ios_base::sync_with_stdio(0);
  cin.tie(0);
  int n, res = 0;
  cin >> n;
  int a[n + 1], p[n + 1];
  p[0] = 0;
  for (int i = 1; i <= n; i++) cin >> a[i], p[i] = max(p[i - 1], a[i]);
  fill(cur + 1, cur + n + 1, 1);
  for (int i = n - 1; i >= 1; i--)
  {
    res = (res + (((a[i + 1] - 1) * cur[p[i]]) % mod)) % mod;
    for (int j = 1; j <= n; j++) nw[j] = cur[j + 1] + (cur[j] * j) % mod;
    for (int j = 1; j <= n; j++) cur[j] = nw[j];
  }
  cout << (res + 1) % mod << '\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