What is smallpdf(app) for? How can I use it?
1 answer:
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There were balls but we took
balls out, so there are now
balls. We add
balls and now we have
balls.
The program that computes this (I will use python as language has not been specified is the following):
n, a, b = int(input()), int(input()), int(input())
print(f"There are {n-a+b} balls in the box")
# Hope this helps