Module: (Java) Subroutines: Procedures and Functions - 2


Problem

9/11

Logic functions. Perfect Numbers

Problem

A perfect number is a number equal to the sum of all its divisors less than itself (for example, the number 6=1+2+3). Write a program that takes a natural number N and determines whether the number N is perfect. Use  a function to find the sum of the divisors of a number and a logical function to check whether the number is perfect or not.

Input: The input string contains a natural number N .

Output: If a number N – perfect, the program should output the word 'YES', otherwise – the word 'NO'.

Examples
# Input Output
1 28 YES
2 29 NO

time 1000 ms
memory 256 Mb
Rules for program design and list of errors in automatic problem checking

Teacher commentary

Insert the missing code snippets
Java
Write the program below 
def SumOfDivisions(n):        
def isPerfectNumber(n):        
N = int(input())

     

Program check result

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