Submission #1294052

#	Time	Username	Problem	Language	Result	Execution time	Memory
1294052		LIA	Money (IZhO17_money)	C++17	100 / 100	764 ms	55176 KiB

money

//
// Created by liasa on 22/11/2025.
//
#include <bits/stdc++.h>
using namespace std;
#define ll long long

int main() {
  ios_base::sync_with_stdio(0);
  cin.tie(0);
  ll n;
  cin >> n;
  vector<ll> a(n + 1);
  for (int i = 0; i < n; ++i)
    cin >> a[i];

  int last = 0, ans = 0;
  set<int> taken;
  taken.insert(1e7);
  for (int i = 1; i <= n; ++i) {
    if (a[i] < a[i - 1]) {
      while (last < i) {
        int bigger = *taken.upper_bound(a[last]);
        while (*taken.lower_bound(a[last]) <= bigger && last < i)
          taken.insert(a[last++]);
        ans++;
      }
    }
  }
  cout << ans;
}

• Subtask 1: 9 / 9
• Subtask 2: 16 / 16
• Subtask 3: 20 / 20
• Subtask 4: 55 / 55