Project Euler #189: Tri-colouring a triangular grid

Hacker
Rank
Score
421
flag of United States
13.33
424
flag of Sri Lanka
13.33
425
flag of India
13.33
427
flag of India
13.33
428
flag of Germany
13.33
429
flag of India
13.33
430
flag of Brazil
13.33
432
flag of India
13.33
433
flag of India
13.33
435
flag of India
13.33
436
flag of India
13.33
437
flag of Brazil
13.33
439
flag of Colombia
13.33
440
flag of Hungary
13.33
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