Please help in logic

#1

i’m unable to build a apporoch for this problem please explain

#2

hello @vketan182

Intuition :

  • Put loop on string that will give substring of every length.
  • create a function that will return true if the passed number is a CB number otherwise return false.
  • To put a check if the digit is already a part of the any other CB number, create an boolean array say, valid which store which digits till now has been a part of any other CB number.
  • Take a counter and increment if a CB number is found.
  • At the end print the count.
#3

image
what role does it play??

#4

@vketan182
that function is converting string representation of number to integer

for example if string is “123” then it will convert it to 123

#5

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