#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#include <time.h>

#define COUNT 100

typedef struct  {
    double x;
    double y;
} point;

double distanceDecart(point,point);

double maxDist(point pts[], int size){
    double max = 0;
    for (int i = 0; i < size; i++){
        for (int j = 0; j < size; j++){
            double dist = distanceDecart(pts[i], pts[j]);
            if (dist > max){
                max = dist;
            }
        }
    }
    return max;
}

int main(){
    srand(time(NULL));
    point points[COUNT];
    for (int i = 0; i < COUNT; i++){
        points[i].x = rand() % 11;  // [0-10]
        points[i].y = rand() % 11;
    }

    for (int i = 0; i < COUNT; i++){
        printf("Point[%d] (%.1lf, %.1lf)\n", i, points[i].x, points[i].y);
    }

    double maxD = maxDist(points, COUNT);
    printf("Max distance: %.2lf\n", maxD);

}

double distanceDecart(point p1, point p2){
    return sqrt((p1.x-p2.x)*(p1.x-p2.x) + (p1.y-p2.y)*(p1.y-p2.y));
}