Given an integer N, the task is to represent N as the sum of two composite integers. There can be multiple ways possible, print any one of them. If it is not possible to represent the number as the sum of two composite numbers then print -1.
Input: N = 13
Output: 4 9
4 + 9 = 13 and both 4 and 9 are composite.
Input: N = 18
Output: 4 14
Approach: When N ≤ 11 then only 8 and 10 are the integers which can be represented as the sum of two composite integers i.e. 4 + 4 and 4 + 6 respectively.
When N > 11 then there are two cases:
- When N is even: N can be represented as 4 + (N – 4) since both are composite.
- When N is odd: N can be represented as 9 + (N – 9).
Below is the implementation of the above approach:
- Represent a number as sum of minimum possible psuedobinary numbers
- Find a sequence of N prime numbers whose sum is a composite number
- Composite numbers with digit sum 1
- Split n into maximum composite numbers
- Find two Composite Numbers such that there difference is N
- Product of all the Composite Numbers in an array
- Find a range of composite numbers of given length
- Sum and Product of all Composite numbers which are divisible by k in an array
- Sum and product of k smallest and k largest composite numbers in the array
- Represent the fraction of two numbers in the string format
- Generate a list of n consecutive composite numbers (An interesting method)
- Queries for the difference between the count of composite and prime numbers in a given range
- Find the total number of composite factor for a given number
- Find the maximum number of composite summands of a number
- Composite Number
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