Submission #1276699

#	Time	Username	Problem	Language	Result	Execution time	Memory
1276699		coderg300711	Infinite Race (EGOI24_infiniterace2)	C++20	100 / 100	66 ms	9616 KiB

Main

#include <bits/stdc++.h>
#include <vector>
using namespace std;
typedef long long ll;
void setIO(string name = ""){ios_base::sync_with_stdio(false); cin.tie(0); cout.tie(0); if(name.size()){ freopen((name + ".in").c_str(), "r", stdin);freopen((name + ".out").c_str(), "w", stdout);}}

const ll maxn=2e5+5,mod=1e9+7;

signed main(){
    setIO("");
    
    ll n,ans=0,q;
    cin>>n>>q;
   set<ll> s;
   for(ll i=0;i<q;i++){
    ll x;
    cin>>x;
    if(x>0){
        if(s.count(x)){
            ans++;
            s.clear();
        }
        s.insert(x);
    }else s.erase(-x);
   }
   cout<<ans<<'\n';

    return 0;
}

Compilation message (stderr)

Main.cpp: In function 'void setIO(std::string)':
Main.cpp:5:113: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
    5 | void setIO(string name = ""){ios_base::sync_with_stdio(false); cin.tie(0); cout.tie(0); if(name.size()){ freopen((name + ".in").c_str(), "r", stdin);freopen((name + ".out").c_str(), "w", stdout);}}
      |                                                                                                          ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Main.cpp:5:157: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
    5 | void setIO(string name = ""){ios_base::sync_with_stdio(false); cin.tie(0); cout.tie(0); if(name.size()){ freopen((name + ".in").c_str(), "r", stdin);freopen((name + ".out").c_str(), "w", stdout);}}
      |                                                                                                                                                      ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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