Cod sursa(job #1105275)

Utilizator paul_danutDandelion paul_danut Data 11 februarie 2014 17:47:30
Problema Ridicare la putere in timp logaritmic Scor 10
Compilator cpp Status done
Runda Arhiva educationala Marime 0.45 kb
#include <fstream>

using namespace std;

ifstream f("lgput.in");
ofstream g("lgput.out");
#define mod 1999999973

typedef  long long int  lli;

lli n,p,x,r=1;

void power(lli p,lli &x,lli &r)
{
    if(p==1)
       x=n;
    else
        {power(p/2,x,r);
        if(p%2==1)
          r=(n*r)%mod;
        x=(x*x)%mod;}
}

int main()
{
    f>>n>>p;

    power(p,x,r);
    g<<(x*r)%mod;

    f.close();g.close();
    return 0;
}