Submission #1226522

#	Time	Username	Problem	Language	Result	Execution time	Memory
1226522		gry3125	Infinite Race (EGOI24_infiniterace2)	C++20	100 / 100	39 ms	1984 KiB

Main

#include <bits/stdc++.h>
#define f0r(i,n) for(int i=0;i<n;i++)
typedef long long int ll; 
using namespace std;

int main() {
    int n, q, ans = 0; cin >> n >> q;
    int idx = 0, cur = 0; 
    vector<int> a(q), mp(n);
    f0r(i,q) cin >> a[i];
    f0r(i,n) mp[i] = -1;

    for (int i = 0; i < q; i++) {
        if (a[i] > 0 && mp[a[i]] >= idx) {
            ans++; idx = i;
        }
        if (a[i] < 0) mp[-a[i]] = -1;
        else mp[a[i]] = i;
    }
    cout << ans;
    return 0;
}

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