Really randomising things

Ref: [https://stackoverflow.com/questions/39529364/go-rand-intn-same-number-value](https://stackoverflow.com/questions/39529364/go-rand-intn-same-number-value)

utils.go

@@ -3,6 +3,9 @@ package utils
 import "math/rand"
 
 func RandArray(n int) []int {
+    // needed a seed input else it will generate the same number
+    rand.Seed(time.Now().UnixNano())
+    
     arr := make([]int, n)
     for i := 0; i <= n - 1; i++ {
         arr[i] = rand.Intn(n)