#include<stdio.h>
#include<conio.h>
#define AM(a,b) ((a+b)/2)
#define ABS(d) (d>=0?d:(-d))
#define TOLOWER(ch) (ch=ch+32)
#define MAX(a,b) (a>=b?a:b)
void main()
{
int d,abst;
float...