Sum of positive integers - Prints Garbage value

[sharbu]

The program must accept N integers and print the sum S of all POSITIVE integers with the even positive integers reversed.

Example Input/Output 1:
Input: 4 39 -8 57 24
Output: 138
Explanation: The sum = 39+57+42 = 138 (The even number 24 is reversed)

Example Input/Output 2:
Input: 3 -23 -11 -445
Output: 0

#include<stdio.h>
#include <stdlib.h>

int main()
{
int n,i,arr[100000],count=0,rem,rev=0;
    
    scanf("%d",&n);
    for(i=0;i<n;i++)
    {
        scanf("%d ",&arr[i]);
    }
    
    for(i=0;i<n;i++)
    {
        if(arr[i]>0)
        {
            if(arr[i]%2==0)
            {
                while(arr[i]!=0)
                {
                    rem=arr[i]%10;
                    rev=rev*10+rem;
                    arr[i]=arr[i]/10;
                }
                count=count+rev;
            }
            else
            {
                count=count+arr[i];
            }
        
        }
    }
    printf("%d",count);

}

The program runs perfect for the above two specified example i/o. But for

Input:
32
-89 90 -13 27 63 72 -17 33 58 73 -55 -46 -64 -65 87 62 -76 -13 -50 6 22 70 87 -39 -24 98 -31 -6 39 -80 46 -54

Output: -878418008

Explain me why the problem occurs and how to correct it.

[Flaze07]

Maybe the sum is too big and it overflows try using size_t for count instead

[lastchance]

You don't reinitialise rev to 0 for each new positive even number. You just keep multiplying it by 10 until it overflows.

Set
rev=0;
between lines 19 and 20.