مساعدة رجاء ..

هل المشكلة بالجافا سكربت مع شرح رجاء!!

The snail climbs up 7 feet each day

and slips back 2 feet each night. 

How many days will it take the snail to get out of a well with the given depth?

Sample Input: 

31

Sample Output:

6

Explanation: Let's break down the distance the snail covers each day:

Day 1: 7-2=5

Day 2: 5+7-2=10

Day 3: 10+7-2=15

Day 4: 15+7-2=20

Day 5: 20+7-2=25

Day 6: 25+7=32 

So, on Day 6 the snail will reach 32 feet and get out of the well at day, without slipping back that night.