A solution by Jan (Time: 2.2s, Blocks used: +118)
A solution by kitty (Time: 3.7s, Blocks used: +121)
A solution by kitty (Time: 3.3s, Blocks used: +133)
A solution by Uu (Time: 2.8s, Blocks used: +88)
A solution by L3S (Time: 2.1s, Blocks used: +146)
A solution by J (Time: 1.7s, Blocks used: +37)