Cod sursa(job #1817452)
Utilizator | Data | 27 noiembrie 2016 20:43:48 | |
---|---|---|---|
Problema | Ridicare la putere in timp logaritmic | Scor | 0 |
Compilator | cpp | Status | done |
Runda | Arhiva educationala | Marime | 0.45 kb |
#include <iostream>
#include <fstream>
using namespace std;
ifstream f("lgput.in");
ofstream g("lgput.out");
int x,n;
int f(int x,int n)
{
if(n<0)
return f(1/x,(-1)*n);
else
if(n==0)
return 1;
else
if(n==1)
return x;
else
if(n%2==0)
return f(x*x,n/2);
else
if(n%2!=0)
return f(x*x,(n-1)/2);
}
int main()
{
f>>x>>n;
g<<f(x,n);
}