Cod sursa(job #2184049)

Utilizator vladsftVlad Safta vladsft Data 23 martie 2018 17:58:03
Problema Ridicare la putere in timp logaritmic Scor 10
Compilator cpp Status done
Runda Arhiva educationala Marime 0.42 kb
#include <fstream>

using namespace std;

ifstream f("lgput.in");
ofstream g("lgput.out");
int m = 1999999973;
int exp(unsigned int n, unsigned int 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()
{
    unsigned int n, p;
    f >> n >> p;
    g << exp(n, p);
    return 0;
}