Cod sursa(job #1818967)
| Utilizator | Data | 29 noiembrie 2016 23:21:34 | |
|---|---|---|---|
| Problema | Ridicare la putere in timp logaritmic | Scor | 10 |
| Compilator | cpp | Status | done |
| Runda | Arhiva educationala | Marime | 0.48 kb |
#include <fstream>
using namespace std;
ifstream fin ("lgput.in");
ofstream fout ("lgput.out");
int long long lgput (int long long x, int n)
{
if (n == 1) return x;
else
if (n % 2) return x * lgput(x * x, (n-1) / 2);
else return lgput(x * x, n / 2);
}
int main()
{
int x, n;
fin >> x >> n;
if (n == 0) fout << 1;
else if (n < 0) fout << lgput(1/x, -n) % 1999999973;
else fout << lgput(x,n) % 1999999973;
return 0;
}
