Cod sursa(job #1082175)

Utilizator gapdanPopescu George gapdan Data 14 ianuarie 2014 11:53:11
Problema Ridicare la putere in timp logaritmic Scor 100
Compilator cpp Status done
Runda Arhiva educationala Marime 0.47 kb
#include <cstdio>
#define MOD 1999999973
using namespace std;
long long a,n,p;
int main()
{
    freopen("lgput.in","r",stdin);
    freopen("lgput.out","w",stdout);
    scanf("%lld%lld",&a,&n);
       p=1;
    while(n>0)
    {
        if(n%2==1)
        {
            p=p*a;
            p%=MOD;
            --n;
        }
        else
        {
            a=a*a;
            a%=MOD;
            n=n/2;
        }
    }
    printf("%lld\n",p);
    return 0;
}