鐵人檔案
Given a string s consisting of words and spaces, return the length of the last...
Given two strings needle and haystack, return the index of the first occurrence...
Write a function to find the longest common prefix string amongst an array of s...
Given two strings s and t, return true if s is a subsequence of t, or false oth...
Given two strings ransomNote and magazine, return true if ransomNote can be con...
