I am getting timeout for test cases 5, 6, 7. When I debugged with the inputs I've seen that my timeout occurs while creating the Segment Tree.

I have been looking into the code for 2 days and I still could not figure out what is the cause of this.

You can find my tree construction code below. Any help is appreciated.

def makeTree(ll:List[Int], l:Int, r:Int): Tree[Int] = {   
        if (r==l) {
            Leaf(ll(l), l, r)
        }
        else {
            var left = makeTree(ll, l, (l+r)/2)
            var right = makeTree(ll, (l+r)/2+1, r)
            
            Node(left, right, List(left.value, right.value).min, l, r)
        }               
    }

ll is the input array. Leaf and Node needs no explainations I believe.