Cod sursa(job #1656327)

Utilizator andreigasparoviciAndrei Gasparovici andreigasparovici Data 19 martie 2016 10:09:09
Problema Ridicare la putere in timp logaritmic Scor 10
Compilator cpp Status done
Runda Arhiva educationala Marime 0.41 kb
#include <cstdio>
using namespace std;
long long int putere_log(int x,int n)
{
    long long int p=1;
    while(n>0)
    {
        if(n&1)
        {
            p*=x;
            n--;
        }
        x=x*x;
        n>>=1;
    }
    return p;
}
int main()
{
    int a,b;
    fscanf(fopen("lgput.in","r"),"%d %d ",&a,&b);
    fprintf(fopen("lgput.out","w"),"%lld\n",putere_log(a,b));
    return 0;
}