text: #include <string.h>
  
  #define max(a, b) (((a) > (b)) ? (a) : (b))
  
  int findLUSlength(char* a, char* b)
  {
  	if (strcmp(a, b) == 0)
  		return -1;
  	int alen = strlen(a), blen = strlen(b);
  	return max(alen, blen);
  }
  