Cod sursa(job #484138)

Utilizator CossAlbulescu Cosmina Coss Data 12 septembrie 2010 13:55:40
Problema Ridicare la putere in timp logaritmic Scor 100
Compilator cpp Status done
Runda Arhiva educationala Marime 0.55 kb
#include <stdio.h>
using namespace std;

#define MOD 1999999973

int bin[1001];
long long n, p, rez = 1;
int i, j;

int main ()
{
    FILE *f = fopen ("lgput.in","r");
    FILE *g = fopen ("lgput.out","w");
    fscanf (f,"%lld %lld", &n, &p);

    while (p)
    {
        i ++;
        bin[i] = p % 2;
        p /= 2;
    }

    for (j=i; j>=1; --j)
    {
        rez = (rez * rez) % MOD;
        if (bin[j])
            rez = (rez * n) % MOD;
    }

    fprintf (g, "%lld\n", rez);

    fclose (g);
    fclose (f);
    return 0;
}