Cod sursa(job #1897657)

Utilizator gabrielamoldovanMoldovan Gabriela gabrielamoldovan Data 1 martie 2017 17:01:52
Problema Ridicare la putere in timp logaritmic Scor 10
Compilator cpp Status done
Runda Arhiva educationala Marime 0.56 kb
#include <iostream>
#include <fstream>

#define mod 1999999973

using namespace std;

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

int log(int x, int p)
{
    if(p < 0) return log(1/x, -p);
    else
    {
        if(p == 0) return 1;
        else
        {
            if(p == 1) return x;
            else
            {
                if(p % 2 == 0) return log(x*x, p/2);
                else return x*log(x*x, (p-1)/2);
            }
        }
    }
}

int main()
{
    int n, p;
    f >> n >> p;
    g << log(n, p);
    return 0;
}