1057번: 토너먼트

#include <iostream>

using namespace std;

int main()

{

int n, a, b, count = 1, temp;

cin >> n >> a >> b;

if (a > b)

{

temp = a;

a = b;

b = temp;

}

for (; n > 1; n /= 2, ++count)

{

if (a % 2 == 1 && a + 1 == b)

break;

a = (a % 2 == 0) ? a / 2 : (a + 1) / 2;

b = (b % 2 == 0) ? b / 2 : (b + 1) / 2;

}

cout << count;

}