#include <stdio.h>
unsigned func(unsigned n,unsigned p,unsigned m)
{
unsigned k=1;
n%=m;
while(p!=1)
{
if(0!=(p&1))
k=(k*n)%m;
n=(n*n)%m;
p>>=1;
}
return (n*k)%m;
}
void main( )
{
printf("%d\n",func(2,10,11));
}