Cod sursa(job #2576302)

Utilizator PaulOrasanPaul Orasan PaulOrasan Data 6 martie 2020 18:26:50
Problema Ridicare la putere in timp logaritmic Scor 100
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 0.57 kb
#include <fstream>

using namespace std;

ifstream fin("lgput.in");
ofstream fout("lgput.out");

const int modulo=1999999973;
long long int n,p;
long long int calculare(long long int x,long long int k)
{
    if (k==1)
        return x;
    if (k==0)
        return 1;
    if (k%2==0){
        return (calculare(((x%modulo)*(x%modulo))%modulo,k/2))%modulo;
    }
    return ((x%modulo)*(calculare(((x%modulo)*(x%modulo))%modulo,(k-1)/2))%modulo)%modulo;
}
int main()
{
    fin>>n>>p;
    fin.close();
    fout<<calculare(n,p);
    fout.close();
    return 0;
}