摘要：Source Count how many 1 in binary representation of a 32-bit integer. Example Given 32, return 1 Given 5, return 2 Given 1023, return 9 Challenge If t 阅读全文

摘要：Source In data structure Hash, hash function is used to convert a string(or any other type) into an integer smaller than hash size and bigger or equal 阅读全文