Cod sursa(job #369516)

Utilizator dead_knightTitei Paul Adrian dead_knight Data 28 noiembrie 2009 16:45:44
Problema Ridicare la putere in timp logaritmic Scor 0
Compilator cpp Status done
Runda Arhiva educationala Marime 0.52 kb
#include<iostream>
#include<fstream >
using namespace std;

unsigned long long int putere(int n, int p)
{
    if(p==1)
        return n;
    else
    {
        if(p%2==0)
        {
            int a=putere( n, p/2);
            return a*a;
        }
        if(p%2==1)
            return (putere( n, p-1)) * n;
    }
}

int main()
{
    int n,p;
    FILE * fin=fopen("lgput.in","r"), * fout=fopen("lgput.out","w");
    fscanf(fin,"%d %d", &n, &p);
    fprintf(fout,"%llu",putere(n,p));
    return 0;
}