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Cod sursa(job #1335351)

Utilizator Arodoet96Teodora Stoleru Arodoet96 Data 5 februarie 2015 14:11:30
Problema Ridicare la putere in timp logaritmic Scor 10
Compilator cpp Status done
Runda Arhiva educationala Marime 0.33 kb
Raporteaza aceasta sursa 
#include <fstream>

using namespace std;

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

int n, p;

int exp(int k);

int main()
{
    fin>>n>>p;
    fout<<exp(p)<<'\n';
    return 0;
}

int exp(int k)
{
    if(k==1) return n;
    int x=exp(k/2);

    if(k%2==0) return x*x;
        else return x*x*n;
}