Cod sursa(job #2460575)

Utilizator Catalin2002Catalin Craciun Catalin2002 Data 23 septembrie 2019 22:33:48
Problema Ridicare la putere in timp logaritmic Scor 30
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 0.63 kb
#include <iostream>
#include <fstream>
using namespace std;

ifstream fin("lgput.in");
ofstream fout("lgput.out");

const long long modul=1999999973;

long long ridicare_putere(long long a, long long n)
{
    long long x;

    if(n==1)
    {
        return a%modul;
    }

    if(n%2==0)
    {
        x=ridicare_putere(a,n/2)%modul;
        return (x*x)%modul;
    }
    else
    {
        x=ridicare_putere(a,(n-1)/2)%modul;
        return (x*x*a)%modul;
    }



}

int main()
{
    long long a,n,i,s;

    fin>>a>>n;


    //fout<<s;


    fout<<ridicare_putere(a,n)%modul;

    return 0;
}