PATA-1004 Counting Leaves
Counting Leaves(PATA-1004) 题面 A family hierarchy is usually presented by a pedigree tree. Your job is to count those family members who have no child. 输入 Each input file contains one test case. Each case starts with a line containing 0<N<100, the number of nodes in a tree, and M (<N), the number of non-leaf nodes. Then M lines follow, each in the format: 1ID K ID[1] ID[2] ... ID[K] where ID is a two-digit number representing a given non-leaf node, K is the number of its children, followed by a sequence of two-digit ID’s of its children. For the sake of simplicity, let us fix the root ID to be 01. ...