Modular exponential test cases not passing

#1

test cases are not passing .
code–
#include
using namespace std;
int main() {
long long int a,b,c;
cin>>a>>b>>c;
long long int x=(a^b)%c;
cout<<x;
return 0;
}

#2

The failure of code is due to the following reason:

The maximum value a and b can have is 100000.
What you are are doing is a^b i.e. 100000^100000.

Is there any datatype available to store this big(infinitely big) value?
No, is the answer.

This, is the reason you are getting wrong output. If you want to verify this, then I would suggest you to print ans and see what it print.

Think of a different way to calculate modular exponential.
Hint: study about exp. by squaring method algorithm.

Refer the below mentioned link for details:
https://www.google.com/url?sa=i&source=web&cd=&ved=2ahUKEwiW37bntJTjAhXXWisKHU6SAswQzPwBegQIARAC&url=https%3A%2F%2Fwww.geeksforgeeks.org%2Fexponential-squaring-fast-modulo-multiplication%2F&psig=AOvVaw1vw3oDqn1bMtovjRL8iMdC&ust=1562094281766744

If you still have doubts, feel free to ask.

#3

I am marking this doubt as resolved as you have not replied to this thread for 5 day.
In case, you still have some doubts regarding the same problem, you can reopen this doubt.

#4

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