Cod sursa(job #1732596)
Utilizator | Data | 21 iulie 2016 23:54:15 | |
---|---|---|---|
Problema | Ridicare la putere in timp logaritmic | Scor | 10 |
Compilator | cpp | Status | done |
Runda | Arhiva educationala | Marime | 0.44 kb |
#include <iostream>
#include <fstream>
using namespace std;
ifstream f("lgput.in");
ofstream g("lgput.out");
int xlan(int x,int n)
{
if(x<0)
return xlan(1/x,-n);
else if(n==1)
return x;
else if(n==0)
return 1;
else if(n%2==0)
return xlan(x*x,n/2);
else if(n%2)
return x*xlan(x*x,(n-1)/2);
}
int main()
{
int a,b;
f>>a>>b;
g<<xlan(a,b);
}