#include <iostream>#include <cstdio>#include <cstdlib>#include <cstring>#include <algorithm>using namespace std;char st[100];bool check(){ for (int i = 1; i < 4; i++) if (st[i] != st[i - 1]) return true; return false;}int main(){ while (scanf("%s", st) != EOF) { if (st[0] == '-') break; printf("N=%s:n", st); if (!check() || strlen(st) != 4) { printf("No!!n"); continue; } int t = 0; int len = 4; while (1) { sort(st, st + len); int x, y; x = y = 0; for (int i = len - 1; i >= 0; i--) x = x * 10 + st[i] - '0'; for (int i = 0; i < len; i++) y = y * 10 + st[i] - '0'; printf("%d-%d=%dn", x, y, x - y); t++; if (x - y == 6174 || x - y == 0) break; x = x - y; len = 0; while (x > 0) { st[len] = x % 10 + '0'; x /= 10; len++; } } printf("Ok!! %d timesn", t); } return 0;}
