What is problem in this?

#1
#2

You are doing n = n / 10 in the loop until it’s zero, how do expect correct answer later by using the same n.

#3

i am not using the n again…i am storing it in array

#4

Please store it in a temp variable first, so that you do not lose the original n after,

	while(n!=0){
		n%10;
		n=n/10;
		c++;
	}
#5

https://ide.codingblocks.com/s/326274…1tc is failed?

#6

I can debug it but, also note that there is a better approach for this, which makes it very simple to solve and code.

Just use a string instead of int and replace every character ‘c’ with min(c, ‘9’ - c + ‘0’);

#7

The error is for a case like, 54, your code will not change ‘5’ as i == 0, but the answer should be 44.

#8

https://ide.codingblocks.com/s/326274…i have updated whats the error now?

#9

also tell better approach of how to do it using string

#10

No, it is still not correct.
Try the code for ‘54’ and you’ll see why?

#11

Yes, please see the following,

#include<bits/stdc++.h>
using namespace std;

int main()
{
	string n;
	cin >> n;
	if (n[0] != '9') { n[0] = min(n[0], char(('9' - n[0]) + '0')); }
	for (int i = 1; i < n.size(); ++i) {
		n[i] = min(n[i], char(('9' - n[i]) + '0'));
	}
	cout << n;
	return 0;
}