Failed test cases

#1

i am not getting why is my code failing few of the test cases. please help me!!

#include
using namespace std;

int main()
{
int n;
cin>>n;
int check=0;
int recheck=0;
int alt;
alt =n;
while(alt>0)
{
check++;
alt=alt/10;

}
alt = n;
int arr[check+1000];
for(int i=check-1; i>=0; i--)
{
    arr[i]=(alt%10);
    alt = alt/10;
}
for(int i=0; i<check; i++)
{
    if((9-arr[i])<arr[i])
    {
        arr[i]=9-arr[i];
    }
}
for(int i=0; i<check; i++)
{
    if(arr[i]==0)
    {
        recheck++;
    }
    else
    {
        i =(check-1);

    }
}
for(int i=0; i<recheck; i++)
{
    arr[i] = (9-arr[i]);
}

for(int i=0; i<check; i++)
{
    cout<<arr[i];
}

return 0;

}

#2

@saurabh66 share your code using cb ide please

#3
#4

input 998
ans 901
your o/p 991 check it

#5

that i corrected.
i wanted to ask in case if input is a negative integer can i calculate the answer after making it positive.
i tried doing it but still my code fail 2 cases.
plz explain what should i do for the negative number.

#6
#7

this is the updated code.

#8

@saurabh66 check for this
932711047202

#9

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