## Solver.py
```python3
#dependancies
from apng import APNG
from PIL import Image
import os

#extract frames from the result APNG
animated = APNG.open("result.apng")
pngs = []
for i, (png, control) in enumerate(animated.frames):
currentp = f"Frame_{i}.png"
png.save(currentp)
pngs.append(currentp)

#iterate through all the PNG frames
original = Image.open("ostrich.jpg")
flag = ""
for png in pngs:
#open the image
img = Image.open(png)

#iterate through all pixels and compare to the original
#if the current pixel differs, it was what was used for steganography calculation
found = None
for x in range(original.width):
#break if found (to save execution time)
if found:
break

for y in range(original.height):
if original.getpixel((x,y)) != img.getpixel((x,y)):
found = (x,y)
break

#if nothing was found, alert
if not found:
print(f"No pixels for {png}")
continue

#get the current pixel
print(f"Pixel located at {found}")
original_pixel = original.getpixel(found)
current_pixel = img.getpixel(found)

#generate the byte string for the current flag char
result = [current_pixel[0]]
if current_pixel[1] != original_pixel[1]:
result.append(current_pixel[1])

#turn the result into an integer
#divide the result by the last pixel and append the result to the flag
result = int.from_bytes(bytearray(result), "big")
result //= original_pixel[2]
flag += chr(result)

#delete the png file after we're done
os.remove(png)

#print flag
print(flag)
```