tried stuff - nothing works yet

09/main.go

@@ -12,8 +12,12 @@ type Point struct {
 	X, Y int
 }
 
-func (p Point) Area(p2 Point) float64 {
-	return math.Abs(float64((p.X - p2.X + 1) * (p.Y - p2.Y + 1)))
+type Rect struct {
+	P1, P2 *Point
+}
+
+func (r Rect) Area() float64 {
+	return math.Abs(float64((r.P1.X - r.P2.X + 1) * (r.P1.Y - r.P2.Y + 1)))
 }
 
 func do(test bool) (int, int) {
@@ -30,11 +34,27 @@ func do(test bool) (int, int) {
 		}
 	}
 
-	largestArea := 0.0
+	largestArea := 0
+	largestArea2 := 0
 
-	for ii, p1 := range points {
-		for _, p2 := range points[ii+1:] {
-			largestArea = math.Max(largestArea, p1.Area(p2))
+	rects := make([]*Rect, len(points)*(len(points)+1)/2)
+
+	for ii := range points {
+		for jj := range points[ii+1:] {
+			rects[ii+jj+1] = &Rect{
+				P1: &points[ii],
+				P2: &points[jj+ii+1],
+			}
+		}
+	}
+
+	for ii := range rects {
+		rr := &rects[ii]
+
+		// iterate all others
+		for jj := range rects {
+			if jj != ii {
+			}
 		}
 	}