> For the complete documentation index, see [llms.txt](https://the-winrars.gitbook.io/writeups/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://the-winrars.gitbook.io/writeups/2020-writeups/rgbctf/misc/differences.md).

# Differences

A Java file where some of the bytes have been corrupted to non-printable values. I went through and corrected it:

```java
import java.util.*;
public class DifferenceTest {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        System.out.print("Enter first number: ");
        int num1 = sc.nextInt();
        System.out.print("Enter second number: ");
        int num2 = sc.nextInt();
        int answer = num1 - num2;
        System.out.println("The difference is: " + answer);
    }
}
```

Then used:

```python
f1 = open('DifferenceTest.java', 'rb').read()
f2 = open('Corrected.java', 'rb').read()
f1 = list(f1)
f2 = list(f2)

for one, two in zip(f1,f2):
    if one != two:
        print(chr(one-two), end='')
print('')
```

This takes the difference between any non-matching bytes and prints them as ascii

rgbCTF{tr1pl3\_m34n1ng}


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