Submission #1243037

#	Time	Username	Problem	Language	Result	Execution time	Memory
1243037		dxh074	Infinite Race (EGOI24_infiniterace2)	C++20	100 / 100	20 ms	9912 KiB

Main

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

int main()
{
    ios_base::sync_with_stdio(false); cin.tie(0);
    ll n, q, x, ans = 0;
    cin >> n >> q;
    unordered_set <int> s;

    while(q--)
    {
        cin >> x;
        if (x < 0)
            s.erase(-x);
        else
        {
            if (s.find(x) != s.end()) {
                ++ans;
                s.clear();
            }
            s.insert(x);
        }
    }
    cout << ans << "\n";
    return 0;
}
// V1C

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