Submission #1264168

#	Time	Username	Problem	Language	Result	Execution time	Memory
1264168		coderg	Infinite Race (EGOI24_infiniterace2)	C++20	100 / 100	65 ms	9796 KiB

Main

/* 26.08.25 */
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef vector<ll> vll;
typedef vector<vector<ll>> vvll;
typedef vector<int> vi;
typedef vector<vi> vvi;
typedef vector<bool> vb;
typedef vector<pair<ll,ll>> vpll;
typedef vector<pair<int,int>> vpii;
#define el "\n"
#define yes cout<<"YES\n"
#define no cout<<"NO\n"
#define srt(x) sort(x.begin(),x.end())
#define rev(x) reverse(x.begin(),x.end())
#define tests \
ll t; \
cin >> t; \
while (t--)
#define sz(x) (ll)x.size()
#define fastIO ios_base::sync_with_stdio(false); cin.tie(0); cout.tie(0);
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);}}
#define db double
#define F first
#define S second

const ll INF = 1e18;
const ll MAXN= 1e6;
const ll MOD=1e9+7;
#define pi 3.14159265358979323846

signed main() {
   fastIO;
   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<<el;
    return 0;
}

Compilation message (stderr)

Main.cpp: In function 'void setIO(std::string)':
Main.cpp:23:113: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   23 | 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:23:157: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   23 | 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