Cod sursa(job #3238756)

Utilizator PatrikKev75Szucs Patrik - Kevin PatrikKev75 Data 30 iulie 2024 12:45:02
Problema Ridicare la putere in timp logaritmic Scor 100
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 0.91 kb
#include <fstream>

using namespace std;

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

const int mod = 1999999973;

long long hatvany(long long a, long long b)
{
    /*
    if (b == 0)
    {
        out << b;
    }
    else if (b < 0)
    {
        b = -b;
        a = -a;
    }
    */

    /*if (b == 0)
        return 1;
    if (b == 1)
        return a;

    long long resz = hatvany(a, b / 2);

    if (b % 2 == 0)
    {
        return resz * resz;
    }
    else
    {
        return resz * resz * a;
    }*/
    int result = 1;

    while (b > 0)
    {
        if (b % 2 == 0)
        {
            a = (a * a) % mod;
            b /= 2;
        }
        else
        {
            result = (result * a) % mod;
            b--;
        }
    }

    return result;
}

int main()
{
    int n, p;
    in >> n >> p;

    out << hatvany(n, p);

    return 0;
}