34 人解决，43 人已尝试。
51 份提交通过，共有 124 份提交。
4.1 EMB 奖励。
单点时限: 2.0 sec
内存限制: 256 MB
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 . 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 (from to ) Tony can pay use these coins.
The first line of test case contains two integers , . The second line contains integers, denoting .
Output the answer on a single line.
2 5 1 4 2 1