Submission #1252728

#	Time	Username	Problem	Language	Result	Execution time	Memory
1252728		PlayVoltz	Infinite Race (EGOI24_infiniterace2)	C++20	100 / 100	14 ms	1864 KiB

Main

#include <cstdio>
#include <stdio.h>
#include <stdbool.h>
#include <iostream>
#include <map>
#include <vector>
#include <climits>
#include <stack>
#include <string>
#include <queue>
#include <algorithm>
#include <set>
#include <unordered_set>
#include <unordered_map>
#include <cmath>
#include <cctype>
#include <bitset>
#include <iomanip>
#include <cstring>
#include <numeric>
#include <cassert>
#include <random>
#include <chrono>
#include <fstream>
using namespace std;

#define int long long
#define pii pair<int, int>
#define mp make_pair
#define pb push_back
#define fi first
#define se second

int32_t main(){
	ios_base::sync_with_stdio(0);
	cin.tie(0);
	cout.tie(0);
	int n, q, ans=0, a;
	cin>>n>>q;
	vector<int> prev(n, -1);
	while (q--){
		cin>>a;
		if (a<0)prev[-a]=-1;
		else if (prev[a]==ans)prev[a]=++ans;
		else prev[a]=ans;
	}
	cout<<ans;
}

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