摘要：
题目链接： http://poj.org/problem?id=2653 题目描述： Pick-up sticks Description Stan has n sticks of various length. He throws them one at a time on the floor i 阅读全文
摘要：
题目链接： http://poj.org/problem?id=1556 题目描述： The Doors Description You are to find the length of the shortest path through a chamber containing obstruct 阅读全文