Adjusting Text Size for Readability

This chart is going on a screen at the front of a room, not onto a page held at reading distance, so Pike Street Studio scales the heading and the axis text well above the defaults. Text sized for a laptop is unreadable from the back row, and a chart nobody can read is a chart nobody uses. The studio also prints the count that the talk is actually about: how many readings cleared the target of 50.

Task: Print how many readings are strictly above 50. A reading of exactly 50 has not cleared the target and does not count.

Input

The first line holds an integer n, the number of readings. Each of the next n lines holds one reading, possibly with decimals. n is at least 1.

Output

One line holding a whole number: how many readings cleared 50.

Example:

Input:
4
30
60
70
20

Output:
2