Next_Greater_Element_Circular

def nextGreaterElements(nums):
    Len = len(nums)
    res = [-1]*Len
    stack = []
    for i in range(2*Len-1, -1, -1):
        while(stack and stack[-1] <= nums[i%Len]):
            stack.pop()
        if(stack):
            res[i%Len] = stack[-1]
        else:
            res[i%Len] = -1
        stack.append(nums[i%Len])
    return res

nums = [1,2,3,4,3]
print(nextGreaterElements(nums))