摘要：You are given coins of different denominations and a total amount of money amount. Write a function to compute the fewest number of coins that you nee 阅读全文

摘要：mplement a SnapshotArray that supports the following interface: SnapshotArray(int length) initializes an array-like data structure with the given leng 阅读全文

摘要：A cryptarithmetic puzzle is a mathematical game where the digits of some numbers are represented by letters. Each letter represents a unique digit. Fo 阅读全文

摘要：There are N courses, labelled from 1 to N. We are given relations[i] = [X, Y], representing a prerequisite relationship between course X and course Y: 阅读全文