Submission #1126620

#	Time	Username	Problem	Language	Result	Execution time	Memory
1126620		brover29	Money (IZhO17_money)	C++20	100 / 100	820 ms	55232 KiB

money

#include <bits/stdc++.h>
//qwerty47924692
using namespace std;
using ll = long long;
const ll N=1e6+29;
const string br="617283";

ll n,a[N],ans=1e18;
vector<ll>v;
set<ll>s;
bool cn(vector<ll> &v,ll x=0){
    ll mn=v.front();
    ll mx=v.back();
    auto it=s.lower_bound(mx);
    if(it==s.begin()){
        goto can;
    }
    --it;
    if(mn<*it){
        return 0;
    }
    can:;
    if(x==1){
        for(ll i:v){
            s.insert(i);
        }
    }
    return 1;
}
int main(){
    ios_base::sync_with_stdio(0);
    cin.tie(0);

    cin>>n;
    ll ans=1;
    for(ll i=1;i<=n;i++){
        cin>>a[i];
        v.push_back(a[i]);
        if(a[i]<a[i-1]||!cn(v)){
            v.pop_back();
            cn(v,1);
            v.clear();
            v.push_back(a[i]);
            ans++;
        }
    }
    cout<<ans;

}

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