#include "math.h"

int isqrt(int v)
{
 int i;
 int j;

 i = 1;
 j = 1;
 while (j < v)
  { i <<= 1;
    j <<= 2;
  }
 while ((i < j) || (i > j+1))
  { j = i;
    i = (i + (v/i)) / 2;
  }
 return(i);
}

unsigned int how_many(unsigned int n, unsigned int divr)
{
 return((n+divr-1)/divr);
}