[C++] 백준 1057번 : 토너먼트

https://www.acmicpc.net/problem/1057

#include <iostream>

#include <math.h>

using namespace std;

int main() {

int n;

int m1, m2;

cin >> n >> m1 >> m2;

n--;

m1--;

m2--;

int tmp = 0;

while (1) {

if (n >= 2)

{

n /= 2;

tmp++;

}

else

break;

}

int round = tmp + 1;

int result = 0, flag = 0;

while (flag != 1) {

(m1 / (int)pow(2, tmp)) == (m2 / (int)pow(2, tmp)) ? result++ : flag = 1;

tmp--;

}

round -= result;

cout << round << endl;

}