Submission #888227

#	Time	Username	Problem	Language	Result	Execution time	Memory
888227		pcc	Money (IZhO17_money)	C++14	0 / 100	0 ms	348 KiB

money

#include <bits/stdc++.h>
using namespace std;

#define ll long long
#define pll pair<ll,ll>
#define pii pair<int,int>
#define fs first
#define sc second
#define tlll tuple<ll,ll,ll>


const int mxn = 1e6+10;
int n;
set<int> st;
int ans = 0;
int arr[mxn];

int main(){
	ios::sync_with_stdio(0);cin.tie(0);cout.tie(0);
	cin>>n;
	for(int i = 1;i<=n;i++)cin>>arr[i];
	st.insert(0);
	st.insert(n+1);
	st.insert(arr[1]);
	int ans = 1;
	for(int i = 2;i<=n;i++){
		if(arr[i]<arr[i-1])ans++;
		else{
			auto lit = st.upper_bound(arr[i-1]);
			auto rit = st.upper_bound(arr[i]);
			if(lit != st.end()&&lit != rit)ans++;
			else st.insert(arr[i]);
		}
	}
	cout<<ans;
}

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