1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
#include <iostream>
#include <cstdio>
using namespace std;

int n, maxx = -1, sum, wynik = 0, tab[300100], pom;
//******************************************************************
int main()
{
    scanf("%d", &n);
    for(int i = 0; i < n; i++)
    {
        int a;
        scanf("%d", &a);
        tab[a]++;
        maxx = max(maxx, a);
    }

    for(int i = 0; i <= maxx; i++)
    {
        sum += tab[i];
        //cout << i << " " << sum  << endl;
        if(((sum>>1)<<1) != sum) wynik = pom;
        sum >>= 1;
        pom++;
    }

    while(sum != 0)
    {
        if(((sum>>1)<<1) != sum) wynik = pom;
        sum >>= 1;
        pom++;
    }
    printf("%d\n", wynik);
}