제출 #633182

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
633182		ahmed_shafik	Hindeks (COCI17_hindeks)	C++17	0 / 50	83 ms	15696 KiB

hindeks

#include <bits/stdc++.h>
#define ahmed_is_fast             \
    ios_base::sync_with_stdio(0); \
    cin.tie(0);                   \
    cout.tie(0);
#define ll long long
#define ld long double
#define cc(n) cout << n << "\n"
#define ccc(n) cout << n << ' '
#define endl "\n"
#define all(v) v.begin(), v.end()
#define mx(a, b) a = max(a, b)
#define mn(a, b) a = min(a, b)
#define mem(a, b) memset(a, b, sizeof(a))
#define f(a) a.first
#define s(a) a.second
#define lcm(a, b) (a * b) / __gcd(a, b)
#define sp(x) setprecision(x)
using namespace std;
ll freq[1000005]={0};
void ahmed()
{
    ll n;
    cin>>n;
    ll arr[n+9];
    ll brr[n+9];
    ll z=0;
    ll f=0;
    for(ll i=0; i<n; i++)
    {
        cin>>arr[i];
        freq[arr[i]]++;
        if(freq[arr[i]]==1)
        {
            brr[z]=arr[i];
            z++;
        }
        else
        {
            f++;
        }
    }
    sort(brr,brr+z);
    for(ll i=0; i<z; i++)
    {
        if(arr[i]==n-i-f)
        {
            cout<<arr[i]<<endl;
            return;
        }
        if(freq[arr[i]]>1)
        {
            f-=freq[arr[i]];
        }
    }
}
bool AHMED = false;
int main()
{
    ahmed_is_fast;
    ll t = 1;
    if (AHMED)
    {
        cin >> t;
    }
    while (t--)
    {
        ahmed();
    }
    return 0;
}

• Subtask 1: 0 / 50