Cod sursa(job #2662904)

Utilizator luchiancristianLuchian Cristian luchiancristian Data 24 octombrie 2020 20:08:51
Problema Invers modular Scor 60
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 0.35 kb
Raporteaza aceasta sursa 
#include <fstream>
using namespace std;
ifstream in("inversmodular.in");
ofstream out("inversmodular.out");
long long a,n;
long long r(long long p)
{
    if(p==0)
        return 1;
    long long rez=r(p/2);
    if(p%2==0)
        return rez*rez%n;
    return (rez*rez%n)*a%n;
}
int main()
{
    in>>a>>n;
    out<<r(n-2);
    return 0;
}