제출 #1152401

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1152401		hamzabc	Money (IZhO17_money)	C++20	100 / 100	1131 ms	55164 KiB

money

#include <bits/stdc++.h>
 

using namespace std;
 
 
#define all(x) x.begin(), x.end()
#define mod 1000000007
#define sp << " " <<
#define endl << '\n'


inline int val(set<long long> &st, long long val, bool flag){
	set<long long>::iterator y;
	if (flag)
		y = st.lower_bound(val);
	else
		y = st.upper_bound(val);
	if (y == st.end())
		return -1;
	return *y;
}


signed main(){
	ios_base::sync_with_stdio(false);
	cin.tie(nullptr);
	cout.tie(nullptr);
	long long int N;
	cin >> N;
	vector<long long int> lst(N);
	for (int i = 0; i < N; i++){
		cin >> lst[i];
	}
	long long int ret = 1;
	set<long long int> st;
	st.insert(lst[0]);
	long long frst = -1;
	for (int i = 1; i < N; i++){
		if (lst[i] < lst[i - 1] || (lst[i - 1] != lst[i] && frst != val(st, lst[i], true))){
			ret++;
			frst = val(st, lst[i], false);
		}
		st.insert(lst[i]);
	}
	cout << ret;
}

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