Given a number N. The task is to express N as sum two Abundant Numbers. If it is not possible print -1.
Input : N = 24 Output : 12, 12 Input : N = 5 Output : -1
Approach : An efficient approach is to store all abundant numbers in a set. And for a given number N run a loop from 1 to n and check if i and n-i are abundant numbers or not.
Below is the implementation of the above approach:
- Check if a number can be expressed as a sum of consecutive numbers
- Check whether a number can be expressed as a product of single digit numbers
- Check if a prime number can be expressed as sum of two Prime Numbers
- Check if a number can be expressed as 2^x + 2^y
- Check if a number can be expressed as a^b | Set 2
- Check if a number can be expressed as power | Set 2 (Using Log)
- Check if a number can be expressed as x^y (x raised to power y)
- Abundant Number
- N expressed as sum of 4 prime numbers
- Check if an integer can be expressed as a sum of two semi-primes
- Find ways an Integer can be expressed as sum of n-th power of unique natural numbers
- Number expressed as sum of five consecutive integers
- Check if two numbers have same number of digits
- Check if a number can be written as a sum of 'k' prime numbers
- Check if a number can be represented as a sum of 2 triangular numbers
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