[#3000] feat(AreaOfMaxDiagonal): add golang solution

202508/3000 areaOfMaxDiagonal/GO/main.go

@@ -0,0 +1,27 @@
+package main
+
+import (
+	"fmt"
+	"math"
+)
+
+func areaOfMaxDiagonal(dimensions [][]int) int{
+	maxDiagonal := 0
+	maxArea := 0
+
+	for _, dimension := range dimensions{
+		l := dimension[0]
+		w := dimension[1]
+		diagonalSquare := l * l + w * w
+		area := l * w
+
+		if diagonalSquare > maxDiagonal{
+			maxDiagonal = diagonalSquare
+			maxArea = area
+		}else if diagonalSquare == maxDiagonal{
+			maxArea = int(math.Max(float64(maxArea), float64(area)))
+		}
+	}
+
+	return maxArea
+}