题目描述

Mr Aoligei has $n$ missions. He played most of the time, so the deadline of aool the missions is only $d$ days away. For the i-th mission, he must spend $a_i$ days to do it. Now, you need to tell him how many missions can he do before the deadline. He cannot do more than one mission at a time.

输入格式

Input is given from Standard Input in the following format:
$n \space \space d \newline a_1 \space \space a_2 \space \space \dots \space \space a_d$

输出格式

Print the number of mission he can do before the deadine.

输入输出样例

Input #1:

5 3
2 1 4 3 1

Output #1:

2