The Goldbach conjecture asserts that every even integer greater than 2 can be expressed as the sum of two primes.
Given the even integer n, return c, the number of different ways two primes can be added to result in n. Only count a pair once; the order is unimportant.
Example:
Input n = 10 Output c is 2
because of the prime pairs [3 7] and [5 5].
Input n = 50 Output c is 4
because of [3 47], [7 43], [13 37], and [19 31].
488 Solvers
Return elements unique to either input
442 Solvers
279 Solvers
1035 Solvers
175 Solvers