Chewbacca and numbers : what's the error in this code as my 3 out of 5 cases are working as i submit it

#1

import java.util.Scanner;
import java.lang.Math;
public class Main {
public static void main(String args[]) {
Scanner sc = new Scanner(System.in);
long num = sc.nextLong();
int digits = (int)(Math.log10(num)) + 1;
long [] a = new long[digits];
for(int i = 0 ;i< digits ;i++)
{
a[i] = num%10;
num = num/10;
}
long result = 0;
for(int i =digits-1;i>=0 ; i–)
{
if(a[i]<9-a[i])
{
result = result10 + a[i];
}
else
{
result = result10 + (9-a[i]);
}
} System.out.println(result);
}
}

#2

Hi
Actually your number in test case is large to be stored in a long number … you must use a string to store the input number and then do the manipulation on string … the given range of input number is 10^100

#3

So I have to go for String array

#4

No a single can store all the digits … like if the number is 10245 then your string can contain “10245” .
1 will be at 0th position ,0 at 1st position and so on for rest of characters…

#5

Then how will I omit the leading zeroes?? (Taking an if statement?)
And also I would be needing to type cast the array of characters into int and then form the number by type casting it and appending it in the string.

#6

Thats is the real deal here if you have 9 as first digit for example in the number 9045 then you cannot convert leading 9 to 0. If there is any leading 9 they will remain 9.And you do not need to type cast just subtract the ascii values … for example if the string is str=5055 then for number at index 0 you can do this int temp=str.charAt(0)-‘0’; . This will store the value 5 in temp . Then you can append this to string or directly display it …Do as you please.

#7

I have switched on the collaborate mode ; could you please check which all cases am I not covering??

#8

I used your approach to deal this question .

#9

import java.util.Scanner; public class Main { public static void main(String args[]) { Scanner sc = new Scanner(System.in); String num = sc.nextLine(); StringBuilder res = new StringBuilder(); int count = 0 ; boolean val = true; if(val == true) { for(int i = 0 ; i< num.length() ; i++) { if(num.charAt(i)==‘0’) {count++;} else{ break; } }} if(count == num.length()) { System.out.print(“0”); val = false; } if(val == true) { for(int i = 0 ; i< num.length() ; i++) { if( i==0 && num.charAt(i) == ‘0’) { continue; } if( num.charAt(i) - ‘0’ > ‘9’ - num.charAt(i) ) { int temp = ‘9’ - num.charAt(i); System.out.print(temp); } else { int temp = num.charAt(i) - ‘0’; System.out.print(temp); } } } } }

#10

Please save your code on online ide… Sending code like this changes the code and i cannot even run the code .

#11

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