I don't understand what's wrong with this code?

#include <cstdlib>
#include <iostream>

using namespace std;

int main()
{
int n, k;
while (scanf("%d %d", &n, &k) != EOF)
{

if(n<<1<k)n=1;
else if((n<<1)%k>0)n=((n<<1)/k)+1;
else n=(n<<1)/k;
   printf("%d\n", n);
}
return 0;

}