Submission #1095297

#	Time	Username	Problem	Language	Result	Execution time	Memory
1095297		vjudge1	Infinite Race (EGOI24_infiniterace2)	C++17	100 / 100	62 ms	11860 KiB

Main

#include <bits/stdc++.h>
#define ss second
#define pb push_back
#define mod 1000000007
#define N 200005
#define INF 1000000000000000005
#define pu push
#define ff first
#define pint pair<int,int>
 
typedef long long ll;
 
using namespace std;

int32_t main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    cout.tie(NULL);
    int n;
    cin>>n;
    int t;
    cin>>t;
    bool take[n];
    int cnt[n],ans=0;
    set<int> st;
    memset(cnt,0,sizeof(cnt));
    memset(take,false,sizeof(take));
    while(t--)
    {
        int a;
        cin>>a;
        if(a>0)
        {
            if(st.count(a)){
                st.clear();
                st.insert(a);
                ans++;
            }
            else
                st.insert(a);
        }
        else if(st.count(-a))
            st.erase(-a);
    }
    cout<<ans<<endl;
    return 0;
}

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