Factorial of large number doubt

#1

what could be the approach to this question as by normal method we can find factorial of small numbers only

#2

@yatin do you want hint for this question ?

#3

https://ide.codingblocks.com/s/90299 sir this is my approach but it doesn’t work here so suggest me what should i do

#4

@yatin hey yatin first of all please tell me are trying to attempt this question or you are trying to implement simple factorial calculation program.

#5

m trying to attempt the this question
broken calculator problem

#6

@yatin hey yatin, logic of this problem
Create an array ‘res[ ]’ of MAX size where MAX is number of maximum digits in output.
Initialize value stored in ‘res[ ]’ as 1 and initialize ‘res_size’ (size of ‘res[ ]’) as 1.
Do following for all numbers from x = 2 to n……

a) Multiply x with res[ ] and update res[ ] and res_size to store the multiplication result.

multiply(res[ ], x)

Initialize carry as 0.
Do following for i = 0 to res_size – 1 ……

a) Find value of res[i] * x + carry. Let this value be prod.

b) Update res[i] by storing last digit of prod in it.

c) Update carry by storing remaining digits in carrying.

#7

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#8

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