----- INIT -----
Queue statistics at time 0
    0, x, 0, x, x, x
----- ADD -----
Queue statistics at time 0
    1, x, 1, x, 0, 0
----- ADD -----
Queue statistics at time 1
    2, 1, 2, x, 1, 0
----- ADD -----
Queue statistics at time 2
    3, 1, 3, x, 2, 1
----- REMOVE -----
Queue statistics at time 3
    2, 1, 3, 3, 2, 2
Queue statistics at time 4
    2, 1, 3, 3, 3, 2
----- ADD -----
Queue statistics at time 5
    3, 1, 3, 3, 4, 2
----- REMOVE TWO -----
Queue statistics at time 6
    1, 1, 3, 3, 1, 3
----- REMOVE -----
Queue statistics at time 7
    0, 1, 3, 2, x, 3
----- ADD -----
Queue statistics at time 8
    1, 2, 3, 2, 0, 2
----- REMOVE -----
Queue statistics at time 9
    0, 2, 3, 1, x, 3
----- ADD -----
Queue statistics at time 16
    1, 3, 3, 1, 0, 2
----- ADD -----
Queue statistics at time 17
    2, 2, 3, 1, 1, 2
----- ADD -----
Queue statistics at time 18
    3, 2, 3, 1, 2, 2
PASSED