Submission #1128153

#	Time	Username	Problem	Language	Result	Execution time	Memory
1128153		Vietnow	Money (IZhO17_money)	C++20	45 / 100	1595 ms	9040 KiB

money

#include <bits/stdc++.h>
#define yes cout<<"YES\n"
#define no cout<<"NO\n"
#define int long long
#define ff first
#define ss second
#define pb push_back
#define y1 zildjian
#define left radio
#define right head
 
using namespace std;
 
const int N = 1e6+10;
const int INF = 1e18;
const int mod = 1e9+7;
const int mod1 = 998244353;
mt19937_64 rng(chrono::steady_clock::now().time_since_epoch().count());

int n;
int a[N];

void solve(){
    cin>>n;
    for(int i = 1;i<=n;i++){
        cin>>a[i];
    }
    int ans = 1;
    int lst = 1;
    set<int> s;
    for(int i = 2;i<=n;i++){
        if(a[i]<a[i-1]){
            for(int j = lst;j<=i-1;j++){
                s.insert(a[j]);
            }
            lst = i;
            ans++;
            continue;
        }
        int x = *upper_bound(s.begin(),s.end(),a[lst]);
        if(x>a[lst] && x<a[i]){
            for(int j = lst;j<=i-1;j++){
                s.insert(a[j]);
            }
            lst = i;
            ans++;
        }
    }
    cout<<ans<<'\n';
}


signed main(){
    // freopen("bootfall.in","r",stdin); 
    // freopen("bootfall.out","w",stdout);
    ios_base::sync_with_stdio(0);
    cin.tie(nullptr);
    // cout.tie(nullptr);
    int t = 1;
    // cin>>t;
    for(int i = 1;i<=t;i++){
        // cout<<"Case "<<i<<": ";
        solve();
    }
}

• Subtask 1: 9 / 9
• Subtask 2: 16 / 16
• Subtask 3: 20 / 20
• Subtask 4: 0 / 55