Comments

You should swap line 67 and line 68 of your code.

The time limit of E is too loose that many meet-in-the-middle solutions also passed.

Why do you suggest writing AtCoder?

On FypeBigint(Bignumber) Struct, 3 years ago
+30

Did you use bots or something to stop others from downvoting you? My friends and I downvoted for many times but it's still 0.

But it's no use. Your contribution still loses xD.