String to int coversion(In refernce to question for finding CB nos.)

#1

Hello,
I am not satisfied with the previous explaination. So reopening this query.

I know that we can convert str to int using stoi func but when I am using it in my code I am getting compilation error. Why is it so ?
Also do we have any other way for string to int conversion ?

#2

hi @agganushka_9eb7cecc88bfac61
According to the Problem the work is to find the Max CB numbers from the given number.

  • As to work on substrings of the given number, we will capture the element into the String instead of integer .
  • The number ‘n’ given is nothing to do with our approach(as we are working on String) but can be useful acoording to your approach.

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.

refer this code -->

#3

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