import java.util.*; public class Main{ public static void main(String[] args){ Scanner sc = new Scanner(System.in); int x = sc.nextInt(); int ans = ds(x)-xs(x);//递减-递增 if(ans==0){ //两数相等 System.out.printf("%04d - %04d = %04d\n",ds(x),xs(x),ans); }else{ int n ; do{ n = ds(x)-xs(x); System.out.printf("%04d - %04d = %04d\n",ds(x),xs(x),n); x = n; }while(n!=6174); } } //递减 public static int ds (int x){ int[]a = new int[4]; a[0] = x/1000; a[1] = x/100%10; a[2] = x/10%10; a[3] = x%10; Arrays.sort(a);//默认升序 int sum = a[3]*1000+a[2]*100+a[1]*10+a[0]; return sum; } //递增 public static int xs (int x){ int[]a = new int[4]; a[0] = x/1000; a[1] = x/100%10; a[2] = x/10%10; a[3] = x%10; Arrays.sort(a); int sum = a[0]*1000+a[1]*100+a[2]*10+a[3]; return sum; } }