Medium Accuracy: 46.16%
Submissions: 1250 Points: 4
Given a number N, find if N can be expressed as a + b such that a and b are prime. Note: If [a, b] is one solution with a <= b, and [c, d] is another solution with c <= d, and a < c then [a, b] is considered as our answer.
Example 1:
Input:N = 8Output:3 5Explanation:3 and 5 are both prime and they
add up to 8.
Example 2:
Input:N = 3Output:-1 -1Explanation:There are no solutions to the number 3.
Your Task:
You don't need to read input or print anything. Your task is to complete the function getPrimes() which takes an integer n as input and returns (a,b) as an array of size 2. Note: If no value of (a,b) satisfy the condition return (-1,-1) as an array of size 2.
Expected Time Complexity: O(N*loglog(N)) Expected Auxiliary Space: O(N)
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Avoid using static/global variables in coding problems as your code is tested
against multiple test cases and these tend to retain their previous values.
Passing the Sample/Custom Test cases in coding problems does not guarantee the
correctness of code. On submission, your code is tested against multiple test cases
consisting of all possible corner cases and stress constraints.
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