摘要：
题目链接 题目 A group of tourists is going to kayak and catamaran tour. A rented lorry has arrived to the boat depot to take kayaks and catamarans to the po 阅读全文
摘要：
题目链接 题目 There is a square matrix n × n, consisting of non-negative integer numbers. You should find such a way on it that starts in the upper left cel 阅读全文