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
#include <cstdio>
#include <vector>

std::vector<bool> coins(201740, false);

int main()
{
	int count;
	int value;
	int max_value = 0;
	
	scanf("%d", &count);

	for (int i = 0; i < count; ++i)
	{
		scanf("%d", &value);
		while (coins[value])
		{
			coins[value] = false;
			++value;	
		}
		coins[value] = true;
		if (value > max_value)
		{
			max_value = value;
		}
	}
	printf("%d\n", max_value);
}