Cod sursa(job #2522071)

Utilizator daru06Daria Culac daru06 Data 11 ianuarie 2020 22:36:18
Problema Ridicare la putere in timp logaritmic Scor 100
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 0.84 kb
#include <fstream>
#define MOD 1999999973

using namespace std;

ifstream f("lgput.in");
ofstream g("lgput.out");

long long n,p;


///varianta iterativa la functie;
//long long putere(long long n, long long p)
//{
//    int rez=1;
//    while(p>0)
//        if(p%2==0)
//        {
//            n=(n*n)%MOD;
//            p/=2;
//        }
//        else
//        {
//            rez=(rez*n)%MOD;
//            p--;
//        }
//    return rez;
//}


long long putere (long long p)
{
    long long r;
    if(p==0)
        return 1;
    else
        if(p%2==0)
    {
        r=putere(p/2)%MOD;
        return (r*r)%MOD;
    }
        else
        {
            return n*putere(p-1)%MOD;
        }
}
int main()
{
    f>>n>>p;
    n=n%MOD;
    g<<putere(p);
    f.close();
    g.close();
    return 0;
}