Submission #1285031

#	Time	Username	Problem	Language	Result	Execution time	Memory
1285031		okahak71	Money (IZhO17_money)	C++20	100 / 100	1116 ms	55228 KiB

money

#pragma GCC optimize("O3,unroll-loops")
#include <bits/stdc++.h>
#define ll long long
#define pb push_back
#define ins insert
#define pll pair<ll, ll>
#define vec vector
#define ss second
#define ff first
using namespace std;

const ll inf = 1e17;

void _(){
    ll n; cin >> n; ll last = 0;
    vec<ll>a(n + 1, -1); multiset<ll>nw;
    ll ans = 0; nw.ins(inf);
    for(ll i = 0; i < n; i++) cin >> a[i];
    for(ll i = 1; i <= n; i++){
        if(a[i - 1] > a[i]){
            while(last < i){
                ll up = *nw.upper_bound(a[last]);
                while(*nw.lower_bound(a[last]) <= up and last < i) nw.ins(a[last++]);
                ans++;
            }
        }
    } cout << ans;
}

signed main(){
    ios::sync_with_stdio(false);
    cin.tie(nullptr); _();
}

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