Cod sursa(job #1505566)
Utilizator | Data | 19 octombrie 2015 13:43:50 | |
---|---|---|---|
Problema | Ridicare la putere in timp logaritmic | Scor | 10 |
Compilator | cpp | Status | done |
Runda | Arhiva educationala | Marime | 0.39 kb |
#include <iostream>
#include <fstream>
using namespace std;
ifstream f("lgput.in");
ofstream g("lgput.out");
long long n,p;
int R(float x,int p)
{
if(p<0)return R(1/x,-p);
if(p==0)return 1;
if(p==1)return x;
if(p%2==0)
return R(x*x,p/2);
if(p%2==1)
return x * R(x*x,(p-1)/2);
}
int main()
{
f>>n>>p;
g<<R(n,p);
return 0;
}