
ZOJ Problem Set  2548
Freddie the frosh has chosen to take k courses. To meet the degree requirements, he must take courses from each of several categories. Can you assure Freddie that he will graduate, based on his course selection?
InputInput consists of several test cases. For each case, the first line of input contains 1 ≤ k ≤ 100, the number of courses Freddie has chosen, and 0 ≤ m ≤ 100, the number of categories. One or more lines follow containing k 4digit integers follow; each is the number of a course selected by Freddie. Each category is represented by a line containing 1 ≤ c ≤ 100, the number of courses in the category, 0 ≤ r ≤ c, the minimum number of courses from the category that must be taken, and the c course numbers in the category. Each course number is a 4digit integer. The same course may fulfil several category requirements. Freddie's selections, and the course numbers in any particular category, are distinct. A line containing 0 follows the last test case.
OutputFor each test case, output a line containing "yes" if Freddie's course selection meets the degree requirements; otherwise output "no."Sample Input3 2 0123 9876 2222 2 1 8888 2222 3 2 9876 2222 7654 3 2 0123 9876 2222 2 2 8888 2222 3 2 7654 9876 2222 0 Sample Outputyes no Source: University of Waterloo Local Contest 2005.09.24 