me too :(

Their CSS is broken because the table is too wide. Remove "._42ef { overflow: hidden; }" in dev console (or alternatively add "._47zq ._47zr {width: 10px;}"), then you'll get smth readable, though not nice.

If I recall correctly, Snake and Ladder was a tiny error, Rainbow String was an overflow where he wasn't using longs, and his solution to Grundy Graph wasn't real, it was just an end-of-contest submission (didn't work on samples).

Yeah, that's probably my worst performance ever:

• Snake and Ladder: I didn't handle the N=1 case (or more generally, 2 empty cells on the same rung)
• Boomerang Crews: My algorithm was bogus, but passed all the samples.
• Grundy Graph: not a real submission
• RNG: an error in the formulae for expected time to respawn when trying to move a set distance
• Maximinimax: initial range for binary search was too small (the given graph can't have minimax flow more than 2000000, but the augmented graph can)
• Rainbow String: integer overflow