Please explain the code?

#1

#include
using namespace std;
#define ll long long
ll fast_modulo(ll a, ll b,ll c)
{
a=(a%c);
ll product=1;
while(b!=0)
{
if(b&1)
product=(producta)%c;
a=(aa)%c; b=b>>1;
}
return product;
}
int main()
{
ll a,b,c;
cin>>a>>b>>c;
ll num=fast_modulo(a,b,c);
cout<<(num % c);
return 0;
}

#2

please share your code through ide.codingblocks.com

#3

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