Cod sursa(job #1104290)

Utilizator paul_danutDandelion paul_danut Data 10 februarie 2014 17:45:14
Problema Ridicare la putere in timp logaritmic Scor 30
Compilator cpp Status done
Runda Arhiva educationala Marime 0.48 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;

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

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

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

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