Submission #1221077

#	Time	Username	Problem	Language	Result	Execution time	Memory
1221077		Rifal	Infinite Race (EGOI24_infiniterace2)	C++20	100 / 100	66 ms	9800 KiB

Main

#include <bits/stdc++.h>
#include <fstream>
//#include <ext/pb_ds/assoc_container.hpp>
//#include <ext/pb_ds/tree_policy.hpp>
#define endl '\n'
#define pb push_back
#define INF 200000000
#define fi first
#define se second
//#define cin fin
//#define cout fout
using namespace std;
//double const EPS = 1e-14;
typedef long long ll;
//const ll P = 10007;
//const ll mod = 1e9 + 7;
//using namespace __gnu_pbds;
//typedef tree<int, null_type, less<int>, rb_tree_tag, tree_order_statistics_node_update> ordered_set; // find_by_order, order_of_key

int main()
{
    ios_base::sync_with_stdio(0); cout.tie(0); cin.tie(0);
    int n, q; cin >> n >> q;
    set<int> st; int ans = 0;
    while(q--) {
        int x; cin >> x;
        if(x > 0) {
            if(st.find(x) != st.end()) {
                ans++;
                st.clear();
            }
            st.insert(x);
        }
        else {
            x *= -1;
            if(st.find(x) != st.end()) st.erase(x);
        }
    }
    cout << ans << endl;
    return 0;
}

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