Codeforces Round #603 (Div. 2) E. Editor 線段樹
E. Editor The development of a text editor is a hard problem. You need to implement an extra module ...
原文：Codeforces Round #603 (Div. 2)
A. Sweet Problem You have three piles of candies: red, green and blue candies: the first pile contains only red candies and there arer rrcandies in it, the second pile contains only green candies and ...
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