제출 #1129728

#제출 시각아이디문제언어결과실행 시간메모리
1129728khangrlInfinite Race (EGOI24_infiniterace2)C++20
29 / 100
43 ms608 KiB
#include<bits/stdc++.h> #define int long long #define pb push_back using namespace std; signed main(){ bool to[200005]={0}; unordered_set <int> s; map <int, int> mp; int n, q, ans=0; cin>>n>>q; for(int i=1; i<=q; i++){ int e; cin>>e; if(abs(e)==e){ if(to[e]==1){ mp[e]++; ans++; } to[e]=1; } else{ e*=-1; to[e]=0; } } cout<<ans; }
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