OJ Board

Hi I'm getting WA.
How do you sort points? My sort is wrong!
Can someone help me?
This is my code:



#include <math.h>
#include <stdio.h>
#include <algorithm>

using namespace std;

double lado(int x1, int y1, int x2, int y2){
return sqrt(pow(x2-x1,2)+pow(y2-y1,2));
}

double angle(int x1,int y1 ...