The pages waiting to be loaded into memory: 1 -> 2 -> 3 -> 4 -> 3 -> 1 -> 4 -> 2 -> 3 -> 1 -> 4 ->end
page 1 replace in memory.
page 2 replace in memory.
page 3 replace in memory.
page 4 replace in memory, page 1 was swapped out.
page 3 is already in memory.
page 1 replace in memory, page 2 was swapped out.
page 4 is already in memory.
page 2 replace in memory, page 3 was swapped out.
page 3 replace in memory, page 4 was swapped out.
page 1 is already in memory.
page 4 replace in memory, page 1 was swapped out.
0.727273