题目链接：http://exam.upc.edu.cn/problem.php?id=5431题目：题目描述The Barareh village is on fire due to the attack of the virtual enemy. Several places are already on fire and the fire is spreading fast to oth...
题目链接：http://exam.upc.edu.cn/problem.php?id=5094题目：题目描述As part of a CS course, Alice just finished programming her robot to explore a graph having n nodes, labeled 1, 2, . . . , n, and m directed edg...