[BOJ] 1057. 토너먼트

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

1057번: 토너먼트

import java.io.*;
import java.util.StringTokenizer;

public class Main {
    public static void main(String[] args) throws Exception {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(System.out));

        StringTokenizer st = new StringTokenizer(br.readLine());
        int n = Integer.parseInt(st.nextToken());
        int n1 = Integer.parseInt(st.nextToken());
        int n2 = Integer.parseInt(st.nextToken());
        int ans = 1;

        while (true) {
            if ((n1 % 2 == 1 && n2 - n1 == 1) || (n2 % 2 == 1 && n1 - n2 == 1)) {
                bw.write(String.valueOf(ans));
                break;
            }

            n1 = (n1 + 1) / 2;
            n2 = (n2 + 1) / 2;

            ++ans;
        }

        bw.close();
        br.close();
    }
}