Cod sursa(job #2565284)

Utilizator dragossofiaSofia Dragos dragossofia Data 2 martie 2020 13:20:30
Problema Invers modular Scor 60
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 0.55 kb
#include <bits/stdc++.h>

using namespace std;
ifstream fin ("inversmodular.in");
ofstream fout ("inversmodular.out");
long long  x,m;

long long  exponentiere( int x , int p )
{
  if( p == 1 )
        return x ;
 if( p % 2 == 0 )
    {
     long long t = exponentiere( x , p  / 2 ) ;
     return ( 1LL * t * t  ) % m ;

    }
 else
    {
     long long t = exponentiere( x , p  / 2 ) ;
     return ( ( 1LL * t * t  ) % m ) * x % m  ;
    }
}

int main()
{   fin >> x >> m ;
    fout<< exponentiere( x , m - 2 ) ;
    return 0;
}