Cod sursa(job #2184063)
Utilizator | Data | 23 martie 2018 18:06:02 | |
---|---|---|---|
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;
ifstream f("lgput.in");
ofstream g("lgput.out");
int m = 1999999973;
int exp(long long n, long long p)
{
if (p == 0) return n;
else if (p == 1) return n;
else if (p % 2 == 0) return exp(n * n % m, p/2);
else if (p % 2 == 0) return exp(n * n % m, (p-1)/2);
}
int main()
{
long long n, p;
f >> n >> p;
g << exp(n, p);
return 0;
}