Project Euler #42: Coded triangle numbers

Hacker
Rank
Score
5501
flag of India
50.00
5502
flag of India
50.00
5503
flag of India
50.00
5504
flag of India
50.00
5505
flag of India
50.00
5506
flag of Indonesia
50.00
5507
flag of India
50.00
5508
flag of India
50.00
5511
flag of India
50.00

[deleted]

5513
flag of null
50.00
5514
flag of India
50.00
5516
flag of India
50.00
5517
flag of India
50.00
5518
flag of India
50.00
5519
flag of India
50.00

[deleted]

5520
flag of null
50.00
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