Background

Description

Start with 2 int arrays, a and b, of any length. Return how many of the arrays have 1 as their first element.

Format

Input

Output

Samples

[1 2 3] [1 3]

2

[7 2 3] [1]

1

[1 2] []

1

Limitation

1s, 1024KiB for each test case.