Cod sursa(job #1268322)
Utilizator | Data | 20 noiembrie 2014 20:33:59 | |
---|---|---|---|
Problema | Ridicare la putere in timp logaritmic | Scor | 10 |
Compilator | cpp | Status | done |
Runda | Arhiva educationala | Marime | 0.49 kb |
#include <stdio.h>
FILE *fin, *fout;
unsigned long a, b;
unsigned long long power(unsigned long x, unsigned long y)
{
if(y == 0) return 1;
if(y == 1) return x;
unsigned long long temp = power(x, y/2);
return temp*temp*power(x, y%2);
}
int main()
{
fin = fopen("lgput.in", "r");
fout = fopen("lgput.out", "w");
fscanf(fin, "%ld%ld", &a, &b);
fprintf(fout, "%lld", power(a, b));
fclose(fin);
fclose(fout);
return 0;
}