Submission #710113

#	Time	Username	Problem	Language	Result	Execution time	Memory
710113		hpesoj	Money (IZhO17_money)	C++17	0 / 100	0 ms	340 KiB

money

#include <bits/stdc++.h>
#define int long long
#define pi pair <int, int>
#define ppi pair <pi, int>
#define pb push_back
#define fi first
#define se second
#define all(x) x.begin(), x.end()
#define debug(x) cout << #x << ": " << x << '\n'
using namespace std;
const int inf = 1000000000;
int n, a[1000005], prefmax[1000005], prefmin[1000005];
set <int> s;
signed main(){
	ios::sync_with_stdio(0), cin.tie(0);
	cin >> n;
	prefmin[0] = inf;
	for(int i = 1; i <= n; i++){
		cin >> a[i];
		prefmax[i] = max(prefmax[i-1], a[i]);
		prefmin[i] = min(prefmin[i-1], a[i]);
	}
	s.insert(a[1]);
	int ans = 1, l = 2;
	while(a[l] >= a[l-1]){
		s.insert(a[l]);
		l++;
	}
	//for(int i = 1; i < l; i++) cout << a[i] << ' ';
	int i = l, sz = 1, tmpmin = inf, tmpmax = 0;
	while(i <= n){
		//debug(i);
		tmpmin = min(tmpmin, a[i]), tmpmax = max(tmpmax, a[i]);
		if(sz != 1){
			if(a[i] < a[i-1] or (s.upper_bound(tmpmin) != s.lower_bound(tmpmax))){
				ans++, sz = 1;
				for(int j = l; j < i; j++) s.insert(a[j]);
				l = i;
				tmpmin = a[i], tmpmax = a[i];
			}
			else sz++;
		}
		else sz++;
		i++;
	}
	ans++;
	cout << ans;
}

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