Submission #758339

#	Time	Username	Problem	Language	Result	Execution time	Memory
758339		vjudge1	Money (IZhO17_money)	C++17	100 / 100	1154 ms	51252 KiB

money

#include <bits/stdc++.h>
#include <array>
#define setall(a, val) for(auto& x : a) x = val
#define all(v) (v.begin()), (v.end())
#define cerr (cerr << "D: ")
#define ll long long
using namespace std;
clock_t start_time;
double get_time() { return (double)(clock() - start_time) / CLOCKS_PER_SEC; }
void init(bool oj = 0) {
	ios::sync_with_stdio(0); cin.tie(0); cout.tie(0);
	srand(time(0)); start_time = clock();
	if (!oj) {
#ifndef ONLINE_JUDGE
		FILE* _ = freopen("in.txt", "r", stdin);
		//FILE* __ = freopen("out.txt", "w", stdout);
#endif
	}
}
const ll HASH_BASE = 31;
const ll MOD = 2000000011;
const ll N = 1e6 + 7;
const ll M = 1e7 + 1e7 / 2;
//####################################################################################

int main() {
	init(1);

	int n;
	cin >> n;
	vector<int> v(n);
	for (int i = 0; i < n; i++)
		cin >> v[i];

	set<int> s; int ans = 1;
	vector<int> cur = { v[0] };
	for (int i = 1; i < n; i++) {
		int x = s.upper_bound(cur[0]) != s.end() ? *s.upper_bound(cur[0]) : v[i];
		if (x < v[i] || v[i] < v[i - 1]) {
			ans++;
			for(int y : cur)
				s.insert(y);
			cur.clear();
		}
		cur.push_back(v[i]);
	}
	cout << ans << endl;

	cerr << get_time() << "s" << endl;
}

Compilation message (stderr)

money.cpp: In function 'void init(bool)':
money.cpp:15:9: warning: unused variable '_' [-Wunused-variable]
   15 |   FILE* _ = freopen("in.txt", "r", stdin);
      |         ^

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