Cod sursa(job #1503814)

Utilizator Andrei_PopaAndreiCDG Andrei_Popa Data 16 octombrie 2015 23:18:13
Problema Ridicare la putere in timp logaritmic Scor 10
Compilator cpp Status done
Runda Arhiva educationala Marime 0.62 kb
#include <iostream>
#include <fstream>
using namespace std;
ifstream f("lgput.in");
ofstream g("lgput.out");
int exp(int x,int n)
{
    if(n<0)
    {
        exp(1/x,n*(-1));
    }
    else
    {
        if(n==0)
        return 1;
        else
        {
            if(n==1)
            return x;
            else
            {
                if(n%2==0)
                return exp(x*x,n/2);
                else
                return x*exp(x*x,(n-1)/2);
            }
        }
    }
}
int main()
{
int x,n;
    f>>x>>n;
    g<<exp(x,n)%1999999973;


    f.close();
    g.close();
    return 0;
}