Submission #1235145

#TimeUsernameProblemLanguageResultExecution timeMemory
1235145ceresnaInfinite Race (EGOI24_infiniterace2)C++20
29 / 100
32 ms1864 KiB
#include<bits/stdc++.h>
using namespace std;

int main()
{
    long long n, q;
    cin >> n >> q;

    vector<long long> bezci(n, false); // false ak su pred, true ak su za
    long long lap = 0;

    for (long long i = 0; i < q; i++)
    {
        long long a;
        cin >> a;

        if (a < 0) bezci[-a] = false;
        else if (bezci[a]) lap++;
        else bezci[a] = true;
    }

    cout << lap << '\n';
    return 0;
}
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