摘要：A truck has two fuel tanks. You are given two integers, mainTank representing the fuel present in the main tank in liters and additionalTank represent 阅读全文

摘要：There are n people in a line queuing to buy tickets, where the 0th person is at the front of the line and the (n - 1)th person is at the back of the l 阅读全文

摘要：You are given a positive integer n representing the number of nodes of a Directed Acyclic Graph (DAG). The nodes are numbered from 0 to n - 1 (inclusi 阅读全文