Given a number and two digits and . The task is to find the least number not less than N which contains the equal number of digits A and B.
Note: N <= 107
Input : N = 4500, A = 4, B = 7
Output : 4747
The number greater than 4500 which has the same quantity of number ‘4’ and number ‘7’ is 4747.
Input : N = 99999999, A = 6, B = 7
Output : 6666677777
Below is the step by step algorithm to solve this problem:
- If the length of ‘N’ is odd then the resulting number will be of length ‘N+1’ as both ‘a’ and ‘b’ has to be in equal quantity.
- If the length of ‘N’ is even then the resulting number will either be of length ‘N’ or ‘N+2’.
- We will generate the number recursively by appending both A and B one by one and take the minimum of the two for the next recursive call.
- At last return the smallest number greater than or equal to ‘N’.
Below is the implementation of the above idea:
- Largest number not greater than N all the digits of which are odd
- Find next greater number with same set of digits
- Nearest greater number by interchanging the digits
- Largest number not greater than N which can become prime after rearranging its digits
- Count numbers in given range such that sum of even digits is greater than sum of odd digits
- Count of integers in a range which have even number of odd digits and odd number of even digits
- Check whether product of digits at even places is divisible by sum of digits at odd place of a number
- Maximize the given number by replacing a segment of digits with the alternate digits given
- Count of numbers between range having only non-zero digits whose sum of digits is N and number is divisible by M
- Find the Largest number with given number of digits and sum of digits
- Find the average of k digits from the beginning and l digits from the end of the given number
- Check if the sum of digits of number is divisible by all of its digits
- Program to find the quantity after mixture replacement
- Sum of the digits of square of the given number which has only 1's as its digits
- Number of digits in the nth number made of given four digits
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