Cod sursa(job #235715)

Utilizator crawlerPuni Andrei Paul crawler Data 25 decembrie 2008 14:39:34
Problema Ridicare la putere in timp logaritmic Scor 100
Compilator cpp Status done
Runda Arhiva educationala Marime 0.52 kb
#include <stdio.h>

#define ull unsigned long long

unsigned f(unsigned a,unsigned b)
{
         if (b == 0) return 1;
         if (b == 1) return (ull)a%1999999973;
         if (b%2==1) return ((ull)a*f(a,b-1))%1999999973;
         unsigned ret = (ull)f(a,b/2)%1999999973;
         ret = ((ull)ret*ret)%1999999973;
         return ret; 
}

int main()
{
    freopen("lgput.in","r",stdin);
    freopen("lgput.out","w",stdout);
    int a,b;
    scanf("%d%d",&a,&b);
    printf("%u", f(a,b));    
    return 0;
}