n = int(input("Number of elements: "))

if n<=1: print("Error")
else:
    array = list()
    print("Start")
    for i in range(0, n):
        x = int(input("Number: "))
        array.append(x)
    print("List: ", array)

    for i in range(0, n-1): #n-1 to avoid out of bound exception
        print(array[i], "-", array[i+1],"=" ,array[i]-array[i+1])