PYTHON PROGRAM- SURVIVE

Question

You are a poor person in an island. There is only one shop in this island, this shop is open on all days of the week except for Sunday. Consider following constraints:
N – Maximum unit of food you can buy each day.
S – Number of days you are required to survive.
M – Unit of food required each day to survive.
Currently, it’s Monday, and you need to survive for the next S days. 
Find the minimum number of days (ceil value) on which you need to buy food from the shop so that you can survive the next S days, or determine that it isn’t possible to survive.
Input Format:
The first line of the input contains three numbers S, N and M separated by space.
Output Format:
If it is possible to survive the print the number of days, otherwise print 'NO' without quotes.
Example-1
Input:
10 16 2
Output:
2
Example-2
Input:
10 20 30
Output:
NO

Answer 1

Then, what you asking?

Answer 2

what should be the exact code.
Can u solved this??

Answer 3

Its not an hard problem (it require only few basic math operations)... Anyway i dont post solutions to problem that seem assignements... Where you blocked? Can you post your code?