using namespace std;
int answer = 0;

int solution(int n, int a, int b)
{
    ++ answer;

    if ( (a - 1) == b || (a + 1) == b)
        return answer;
    else
        solution ( n ,
                  a % 2 ? a / 2 + 1 : a / 2,
                  b % 2 ? b / 2 + 1 : b / 2);


    return answer;
}