Rating:

Solution script
```python
def reverse_process_flag(transformed):
original_chars = [
chr(ord(c) - (i + 1)) # subtract index+1 because Python is 0-based
for i, c in enumerate(transformed)
]
return ''.join(original_chars)

# Example usage
transformed = "gyhgyl‚|qoj\>@@xqDD|zyJyg}‹…”ˆUD¡"
original = reverse_process_flag(transformed)
print(original)
```

Original writeup (https://github.com/juke-33/Write-ups/tree/main/Full%20Week%20Engineer%20CTF%202025).