Cod sursa(job #369517)
| Utilizator | Data | 28 noiembrie 2009 16:46:59 | |
|---|---|---|---|
| Problema | Ridicare la putere in timp logaritmic | Scor | 10 |
| Compilator | cpp | Status | done |
| Runda | Arhiva educationala | Marime | 0.51 kb |
#include<fstream>
#include<cstdlib>
using namespace std;
unsigned long long int putere(int n, int p)
{
if(p==1)
return n;
else
{
if(p%2==0)
{
int a=putere( n, p/2);
return a*a;
}
if(p%2==1)
return (putere( n, p-1)) * n;
}
}
int main()
{
int n,p;
FILE * fin=fopen("lgput.in","r"), * fout=fopen("lgput.out","w");
fscanf(fin,"%d %d", &n, &p);
fprintf(fout,"%llu",putere(n,p));
return 0;
}
