48 100
60 90 60 90 60 90 60 90 60 90 60 90 60 90 60 90 60 90 60 90 60 90 60 90 60 90 60 90 60 90 60 90 60 90 60 90 60 90 60 90 60 90 60 90 60 90 60 90
     0      0
  1000      0
     0   1000
 -1000      0
    -0  -1000
  2000      0
     0   2000
 -2000      0
    -0  -2000
  3000      0
     0   3000
 -3000      0
    -0  -3000
  4000      0
     0   4000
 -4000      0
    -1  -4000
  5000      0
     0   5000
 -5000      0
    -1  -5000
  6000      0
     0   6000
 -6000      1
    -1  -6000
  7000      0
     0   7000
 -7000      1
    -1  -7000
  8000      0
     0   8000
 -8000      1
    -1  -8000
  9000      0
     0   9000
 -9000      1
    -1  -9000
 10000      0
     0  10000
-10000      1
    -1 -10000
 11000      0
     1  11000
-11000      1
    -2 -11000
 12000      0
     1  12000
-12000      1
    -2 -12000