Cod sursa(job #369512)
Utilizator | Data | 28 noiembrie 2009 16:32:28 | |
---|---|---|---|
Problema | Ridicare la putere in timp logaritmic | Scor | 0 |
Compilator | cpp | Status | done |
Runda | Arhiva educationala | Marime | 0.52 kb |
#include<iostream>
#include<fstream >
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,"%d",putere(n,p));
return 0;
}