Perfect Number Check
Hard
Computer Mathematics
Integers & Divisibility
31 views
Problem Statement
Check if n is a perfect number (sum of proper divisors equals n).
Input Format
One integer n.
Output Format
YES or NO.
Example
28
YES
Constraints
1
Input / Output Format
Input Format
One integer n.
Output Format
YES or NO.
Constraints
1
Examples
Input:
28
Output:
YES
Example Solution (Public)
Compute sum of proper divisors using divisor loop, exclude n itself, compare with n.
Official Solution Code
Compute sum of proper divisors using divisor loop, exclude n itself, compare with n.
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