제출 #710075

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
710075		penguin133	Money (IZhO17_money)	C++17	100 / 100	1423 ms	55172 KiB

money

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

#define int long long
#define pi pair<int, int>
#define pii pair<int, pi>
#define fi first
#define se second
#ifdef _WIN32
#define getchar_unlocked _getchar_nolock
#endif
mt19937_64 rng(chrono::steady_clock::now().time_since_epoch().count());
int n, A[1000005], ans;
set <int> s;

void solve(){
	s.insert(0);
	s.insert(1e6 + 1);
	cin >> n;
	for(int i=1;i<=n;i++)cin >> A[i];
	int lb = 0, ub = (int)1e6 + 1, prv = 0;
	for(int i=1;i<=n;i++){
		int x = *s.upper_bound(A[i]);
		int y = *--s.upper_bound(A[i]);
		int x2 = x, y2 = y;
		if(y == A[i]){
			y2 = *--s.lower_bound(A[i]);
			x2 = A[i];
		}
		if(A[i] < A[i-1] || ((x != ub || y != lb) && (x2 != ub && y2 != lb))){
			ans++;
			for(int j=prv;j<i;j++)s.insert(A[j]);
			prv = i;
			lb = *--s.upper_bound(A[i]);
			ub = *s.lower_bound(A[i]);
		}
	
	}
	cout << ans + 1;
}

main(){
	ios::sync_with_stdio(0);cin.tie(0);
	int tc = 1;
	//cin >> tc;
	for(int tc1=1;tc1<=tc;tc1++){
		// cout << "Case #" << tc1 << ": ";
		solve();
	}
}

컴파일 시 표준 에러 (stderr) 메시지

money.cpp:42:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   42 | main(){
      | ^~~~

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