Submission #1200940

#	Time	Username	Problem	Language	Result	Execution time	Memory
1200940		THXuan	Infinite Race (EGOI24_infiniterace2)	C++20	100 / 100	67 ms	9796 KiB

Main

#include <iostream>
#include <vector>
#include <algorithm>
#include <cmath>
#include <queue>
#include <set>
#include <map>
#define INF 1e9
using namespace std;
typedef long long ll;
const ll MAXN = 100005;

void solve()
{
	int n, q; cin >> n >> q;
	set<int>v;
	int ans = 0;
	while (q--) {
		int x; cin >> x;
		if (x < 0) v.erase(-x);
		else {
			if (v.count(x)) {
				++ans;
				v.clear();
				v.insert(x);
			}
			else v.insert(x);
		}
	}
	cout << ans << "\n";
}

int main()
{
	ios_base::sync_with_stdio(0);
	cin.tie(0);
	int t = 1;// cin>>t;
	while (t--) solve();
	return 0;
}

• Subtask 1: 29 / 29
• Subtask 2: 34 / 34
• Subtask 3: 22 / 22
• Subtask 4: 15 / 15