Users of a system are supposed to pick a 3 character pass code such that there is at least one character that is a digit (number) and one character that is not a letter or number. Something like "A7*" or "45!" or "$2C". The digit and the special symbol may be any of the three characters. Write a program that reads in three characters and prints YES if they meet the criteria and NO if they do not. Hints:

• Remember cctype has functions for isalpha, isdigit, and ispunct. Check the documentation here.
• Also remember that ! is NOT. You can express the idea "x is not a digit character" with:

  !isdigit(x)