Cod sursa(job #1526323)
| Utilizator | Data | 16 noiembrie 2015 09:25:38 | |
|---|---|---|---|
| Problema | Ridicare la putere in timp logaritmic | Scor | 10 |
| Compilator | cpp | Status | done |
| Runda | Arhiva educationala | Marime | 0.46 kb |
#include <bits/stdc++.h>
using namespace std;
ifstream in("lgput.in");
ofstream out("lgput.out");
int timplogaritmic(int x,int n)
{
if(n<0) return timplogaritmic(1/x, -n);
else if(n == 0) return 1;
else if(n == 1) return x;
else if(n%2 == 0) return timplogaritmic(x*x , n/2);
else if(n%2 != 0) return timplogaritmic(x*x , (n-1)/2);
}
int main()
{
int n,x;
in>>x>>n;
out<<timplogaritmic(x,n);
return 0;
}
