Submission #1130060

#	Time	Username	Problem	Language	Result	Execution time	Memory
1130060		irmuun	Infinite Race (EGOI24_infiniterace2)	C++20	100 / 100	79 ms	9800 KiB

Main

#include<bits/stdc++.h>

using namespace std;

#define ll long long
#define pb push_back
#define ff first
#define ss second
#define all(s) s.begin(),s.end()
#define rall(s) s.rbegin(),s.rend()

int main(){
    ios_base::sync_with_stdio(false); cin.tie(0); cout.tie(0);
    int n,q;
    cin>>n>>q;
    set<int>st;
    int ans=0;
    for(int i=1;i<=q;i++){
        int x;
        cin>>x;
        if(x>0){
            if(st.count(x)==0){
                st.insert(x);
            }
            else{
                ans++;
                st.clear();
                st.insert(x);
            }
        }
        else{
            x=-x;
            if(st.count(x)==1){
                st.erase(x);
            }
        }
    }
    cout<<ans;
}

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