f(n)
Problem
f(n) is a function defined as the last 5 non-zero digit in n! For example,
12! = 479001600 so f(12)= 90016 15! = 1307674368000 so f(10)= 74368 20! = 2432902008176640000 so f(20)=17664
Find f(100,000,000,000)
Time Limit: 5
Memory Limit: 256
Source Limit:
