include <stdio.h> include <math.h> typedef struct node{ int x,y;}node;bool judge(int a1 ,int b1 ,int a2 ,int b2,int a3,int b3,int a4,int b4){ int dis[6]; dis[0] = (a1-a2)(a1-a2)+(b1-b2)(b1-b2); dis[1] = (a1-a3)(a1-a3)+(b1-b3)(b1-b3); dis[2] = (a1-a4)(a1-a4)+(b1-b4)(b1-b4);...