Cod sursa(job #1462569)
Utilizator | Data | 18 iulie 2015 15:57:57 | |
---|---|---|---|
Problema | Ridicare la putere in timp logaritmic | Scor | 10 |
Compilator | cpp | Status | done |
Runda | Arhiva educationala | Marime | 0.45 kb |
#include <iostream>
#include <fstream>
using namespace std;
int lg_pow(int x, int n){
if(n == 0)
return 1;
else
if(n == 1)
return x;
if(n%2 == 0)
return lg_pow(x*x, n/2);
else
return x*lg_pow(x*x, (n-1)/2);
}
int x, n;
int main()
{
ifstream f("lgput.in");
ofstream g("lgput.out");
f >> x >> n;
g << lg_pow(x, n);
return 0;
}