advent-of-code/day2byHand at master · gsbernstein/advent-of-code · GitHub

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1,x,y,2
1,1,2,3
1,3,4,3
1,5,0,3
2,1,10,x*4,
1,(2),(x*4),2+4x,
1,(4),(2+4x),27,
2,(6+4x),(5),31,
1,(30+20x),(2),35,
2,(2),(32+20x),39,
1,(64+40x),(1),43,
1,(2),(65+40x),47,
2,(2),(67+40x),51,
1,(134+80x),(1),55,
2,(135+80x),(3),59,
1,(2),(405+240x),63,
1,(3),63,67,
1,67,(4),71,
2,(3),71,75,
1,(2),75,79,
1,(1),79,83,
2,83,(4),87,
1,87,(1),91,
1,91,(3),95,
1,(2),95,99,
2,99,(4),103,
1,103,(1),107,
2,107,(2),111,
1,111,(1),115,
1,(3),115,119,
2,119,(4),123,
1,(2),123,127,
2,(5),127,131,
1,131,(2),135,
1,135,(4),139,
1,(5),139,143,
1,143,(5),147,
1,(1),147,151,
1,151,(y),155,
1,155,(1),0,
99,
2,0,14,0

797908+y+460,800x=19690720
18,892,812 = y + 460800x
41*460800+y = 18,892,812
y = 12