Submission #1070738

#	Time	Username	Problem	Language	Result	Execution time	Memory
1070738		p4r4d0_x	Infinite Race (EGOI24_infiniterace2)	C++14	100 / 100	61 ms	10836 KiB

Main

#define _USE_MATH_DEFINES
#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
#define PUT(a, b) freopen(a, "r", stdin); freopen(b, "w", stdout);
#define all(a) a.begin(), a.end()
#define answerNO {cout << "NO" << endl;}
#define answerYES {cout << "YES" << endl;}
using namespace std;
#define ff first
#define ss second
#define pb push_back
#define replr(i, a, b) for (int i = int(a); i <= int(b); ++i)
#define reprl(i, a, b) for (int i = int(a); i >= int(b); --i)
#define rep(i, n) for (int i = 0; i < int(n); ++i)
#define mkp(a, b) make_pair(a, b)
typedef long long ll;
typedef long double ld;
typedef pair<int, int> PII;
typedef vector<int> VI;
typedef vector<PII> VPI;
typedef pair<ll, ll> PLL;
typedef vector<ll> VL;
typedef vector<PLL> VPL;
template<class T> T setmax(T& a, T b) {if (a < b) return a = b; return a;}
template<class T> T setmin(T& a, T b) {if (a < b) return a; return a = b;}
using namespace __gnu_pbds;
#define ordered_set tree<int, null_type,less<int>, rb_tree_tag,tree_order_statistics_node_update>
ll mod = 1e9 + 7;


void solve(){
    ll n, q; cin >> n >> q;
    set<ll> s;
    ll ans = 0;
    while(q--){
        int x; cin >> x;
        if(x < 0){
            s.erase(-x);
        }
        else{
            if(s.find(x) != s.end()){
                ans++;
                s.clear();
            }
            s.insert(x);
        }
    }
    cout << ans << "\n";
}


    
signed main() {
    ios_base::sync_with_stdio(false);
    cin.tie(NULL), cout.tie(NULL);
    //PUT("traffic.in", "traffic.out");
    int t = 1;
    //cin >> t;
    while(t--){
        solve();
    }
}

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