Broken calculator

#1

i am not able to even start to this problem

#2

Factorial of 100 has 158 digits. It is not possible to store these many digits even if we use long long int.

you have to use array here
Hint:
factorial(n)

  1. Create an array ‘fac[]’ of MAX size where MAX is number of maximum digits in output.let say 1000
  2. Initialize value stored in fac[]’ as 1 and initialize facsize as 1.
  3. Do following for all numbers from x = 2 to n.
    ……a) Multiply x with fac[] and update fac[] and facsize to store the multiplication result.
#3

can you please help me with code for same

#4

actually I tried your approach but it is not working as it is not efficient method

#5

it is efficient and worked

for more efficiency you can use java biginteger class or
use python

#6

please help me with the code

#7

first try and share your code
then i will tell your your mistake