摘要:
Palindrome Pairs Given a list of unique words. Find all pairs of indices (i, j) in the given list, so that the concatenation of the two words, i.e. wo 阅读全文
摘要:
You are given an array x of n positive numbers. You start at point x[0] metres to the north, then x[2] metres to the south, x[3] metres to the east an 阅读全文