Cod sursa(job #265851)
Utilizator | Data | 24 februarie 2009 16:45:36 | |
---|---|---|---|
Problema | Ridicare la putere in timp logaritmic | Scor | 10 |
Compilator | cpp | Status | done |
Runda | Arhiva educationala | Marime | 0.41 kb |
#include <fstream>
using namespace std;
int main()
{
unsigned long x,n,p;
ifstream f("lgput.in");
f>>x>>n;
f.close();
if (n%2==0)
{p=x*x;n=n/2;} else p=1;
while (n>1)
if (n%2==1)
{p=(p*x)%1999999973;
n=n-1;
}
else
{
p=(p*p)%1999999973;
n=n-n/2;
}
ofstream g("lgput.out");
g<<p;
g.close();
return 0;
}