Help in atcoders candies

1

how to solve this?

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2

This was a nice problem, see errichtos stream for the explanation.

3
4

why wrong ans

5

when subtracting do ans=(ans-x+MOD)%MOD
Probably this is the mistake.

2 Likes
6

It worked.
Ty

7

Hey can you help me in this . i am getting wa in 3 test cases.

Here is my solution