解题思路:
注意事项:
参考代码:
import java.util.Arrays; import java.util.Scanner; public class C1530 { public static void main(String[] args) { Scanner sc = new Scanner(System.in); while (sc.hasNext()) { int n = sc.nextInt(); int count = 1; int k = n; while((k = F(k)) != 6174){ count++; } System.out.println(count); } sc.close(); } private static int F(int n){ String input = n < 1000 ? "0"+n : String.valueOf(n); char[] a = input.toCharArray(); Arrays.sort(a); //升序 String min = String.valueOf(a); int rs = Integer.valueOf(new StringBuffer(min).reverse().toString()) - Integer.valueOf(min); return rs; } }
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