Submission #1362425

#	Time	Username	Problem	Language	Result	Execution time	Memory
1362425		avahw	Infinite Race (EGOI24_infiniterace2)	C++20	100 / 100	16 ms	9800 KiB

Main

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

int main(){
    cin.tie(0);
    ios::sync_with_stdio(0);
    int n, q;
    cin >> n >> q;
    int res = 0;
    unordered_set<int> ahead;
    for(int i = 0; i < q; i++){
        int e;
        cin >> e;
        if(e < 0){
            e = abs(e);
            if(ahead.find(e) != ahead.end()) ahead.erase(e);
        }
        else{
            // e = abs(e);
            if(ahead.find(e) != ahead.end()){
                res++;
                // cout << "lap after " << i << "\n";
                ahead = {};
            }
            ahead.insert(e);
        }
    }
    cout << res << "\n";
}

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