题号：NC51167
时间限制：C/C++/Rust/Pascal 1秒，其他语言2秒
空间限制：C/C++/Rust/Pascal 32 M，其他语言64 M
64bit IO Format: %lld
时间限制：C/C++/Rust/Pascal 1秒，其他语言2秒
空间限制：C/C++/Rust/Pascal 32 M，其他语言64 M
64bit IO Format: %lld
题目描述
People in Silverland use coins.They have coins of value 
Silverland dollar.One day Tony opened his money-box and found there were some coins.He decided to buy a very nice watch in a nearby shop. He wanted to pay the exact price(without change) and he known the price would not more than m.But he didn't know the exact price of the watch.
You are to write a program which reads
and
corresponding to the number of Tony's coins of value then calculate how many prices(form 1 to m) Tony can pay use these coins.
You are to write a program which reads
输入描述:
The input contains several test cases. The first line of each test case contains two integers,m
.The second line contains 2n integers, denoting
. The last test case is followed by two zeros.
输出描述:
For each test case output the answer on a single line.