Cod sursa(job #2074685)

Utilizator lonca.sorin01Lonca Sorin lonca.sorin01 Data 24 noiembrie 2017 21:31:40
Problema Ridicare la putere in timp logaritmic Scor 100
Compilator cpp Status done
Runda Arhiva educationala Marime 0.47 kb
#include <iostream>
#include <fstream>
#define mod 1999999973

using namespace std;

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

long long lgput(long long a, long long b)
{
    if (b == 1)
    {
        return a % mod;
    }
    if (b % 2 == 1)
    {
        return (a % mod)*lgput(a % mod, b - 1);
    }
    return lgput((a * a) % mod, b / 2) % mod;
}

int main()
{
    long long a, b;
    f>>a>>b;
    g<<lgput(a, b) % mod;
    return 0;
}