Submission #1305334

#	Time	Username	Problem	Language	Result	Execution time	Memory
1305334		_Temirhan	Infinite Race (EGOI24_infiniterace2)	C++20	0 / 100	13 ms	3396 KiB

Main

#include <bits/stdc++.h>
#include <ext/pb_ds/tree_policy.hpp>  
#include <ext/pb_ds/assoc_container.hpp>

using namespace std;
using namespace __gnu_pbds;

#if defined(__GNUC__) || defined(__clang__)
#pragma GCC optimize("Ofast,unroll-loops,inline-functions,no-stack-protector")
#pragma GCC target("avx2,fma,tune=native")
#pragma clang loop vectorize(enable)
#pragma clang loop interleave(enable)
#endif

#define int long long
#define sz(x) (int)x.size()
#define F first
#define S second
#define pb push_back
#define nl '\n'
#define o_set tree<int, null_type, less_equal<int>, rb_tree_tag, tree_order_statistics_node_update>
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
typedef pair<int, int> pii;

void file( string s = "" )
{
    if( s.empty() )
        return;
    freopen((s + ".in").c_str(), "r", stdin);
    freopen((s + ".out").c_str(), "w", stdout);
}

const int N = 2e5 + 2;
const int N1 = 1e6 + 2;
const int inf = 1e9 + 2;
const int INF = 1e18 + 2;
const int mod = 1e9 + 7;
int T = 1;

void solve()
{
    int n, q;
    cin >>n >>q;
    vector< int > last(n + 1), ans(n + 1);
    int mx = 0;
    for( int i = 1; i <= q; ++i )
    {
        int x;
        cin >>x;
        if( x < 0 )
        {
            ans[-x] = max(0ll, ans[-x] - 1);
            last[-x] = -1;
            ans[-x] = 0;
        }
        else if( x > 0 )
        {
            if( last[x] == 1 )
                ++ans[x];
            last[x] = 1;
            mx = max(mx, ans[x]);
        }
    }
    cout <<mx;
}

signed main()
{
    file("");
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
    // cin >>T;
    while( T-- )
        solve();
}

Compilation message (stderr)

Main.cpp: In function 'void file(std::string)':
Main.cpp:29:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   29 |     freopen((s + ".in").c_str(), "r", stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Main.cpp:30:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   30 |     freopen((s + ".out").c_str(), "w", stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 29
• Subtask 2: 0 / 34
• Subtask 3: 0 / 22
• Subtask 4: 0 / 15