P064_BJ1463_1로만들기.java

import java.util.Scanner;

// dynamic programming
public class P064_BJ1463_1로만들기 {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int N = sc.nextInt();
		int[] dp = new int[N + 1];
		
		dp[0] = 0;
		dp[1] = 0;
		
		for (int i = 2; i <= N; i++) {
			dp[i] = dp[i - 1] + 1;
			if (i % 3 == 0) {
				dp[i] = Math.min(dp[i / 3] + 1, dp[i]);
			}
			if (i % 2 == 0) {
				dp[i] = Math.min(dp[i / 2] + 1, dp[i]);
			}
		}
		
		System.out.println(dp[N]);
	}

}