摘要:
Problem Description One day Sophia finds a very big square. There are n trees in the square. They are all so tall. Sophia is very interesting in them. 阅读全文
摘要:
C. Ayoub and Lost Array Ayoub had an array 𝑎 of integers of size 𝑛 and this array had two interesting properties: All the integers in the array were 阅读全文