[BOJ] 2418 정수 a를 k로 만들기 (JAVA)

https://www.acmicpc.net/problem/25418

25418번: 정수 a를 k로 만들기

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.util.StringTokenizer;

public class Main {
	
    public static void main(String[] args) throws Exception {

        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        StringTokenizer st = new StringTokenizer(br.readLine(), " ");
        int A = Integer.parseInt(st.nextToken());
        int K = Integer.parseInt(st.nextToken());
        int[] dp = new int[K + 1];
        for (int i = A + 1; i <= K; i++) {
            dp[i] = 1000000;
        }

        for (int i = A; i < K; i++) {
            dp[i + 1] = Math.min(dp[i + 1], dp[i] + 1);
            if (i * 2 <= K) dp[i * 2] = Math.min(dp[i * 2], dp[i] + 1);
        }

        System.out.print(dp[K]);
    }
	
}