Whats wrong in my code?

#1

import java.util.Scanner;
public class INVERT {

public static void main(String[] args) {
	Scanner input=new Scanner(System.in);
	int n=input.nextInt();
	n=invert(n);
	reverse(n);
	}

public static int invert(int n) {
	int len=Integer.toString(n).length();
	int temp,a=0,c=0;
	while(a<len) {
		temp=n%10;
		n=n/10;
		if(temp>=5) temp=9-temp;
		c=c*10+temp;
		a++;
	}
	return(c);
}
public static void reverse(int n) {
	int len=Integer.toString(n).length();
	int temp,a=0,c=0;
	while(a<len) {
		temp=n%10;
		n=n/10;
		c=c*10+temp;
		a++;
	}
     System.out.println(c);
}

}

#2

@KUNAL.SHARMA5724510 dry run your code for 332711047202 .also the constraints are for long int .
add the condition if their is 9 at the starting of the number then it must remain the same

#3

PLEASE CORRECT MY CODE.

#4

hi @KUNAL.SHARMA5724510
here is the correct code.
i have removed your reverse function because it will give wrong answer for n=999;
if you have any doubt feel free to ask :blush:
import java.util.Scanner;
public class INVERT {

public static void main(String[] args) {
Scanner input=new Scanner(System.in);
long n=input.nextLong();
n=invert(n);
System.out.println(n);
}

public static long invert(long n) {
int len=Long.toString(n).length();
long temp,a=0,c=0, mul=1;
while(a<len) {
temp=n%10;
n=n/10;
if(n==0 && temp==9){
//do noting
}
else if(temp>=5)
temp=9-temp;

	c+=mul*temp;
	mul=mul*10;
	a++;
}
return(c);

}
public static void reverse(long n) {
int len=Long.toString(n).length();
long temp,a=0,c=0;
while(a<len) {
temp=n%10;
n=n/10;
c=c*10+temp;
a++;
}
System.out.println©;
}
}

#5

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