6 lines
381 B
Markdown
6 lines
381 B
Markdown
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The *trick* here is that we only need to test 1998 numbers. Because there are only so much base10 palindromes:
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- The numbers from `1` to `999` mirrored result into to palindromes `11` to `999999`
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- The numbers from `1` to `999` mirrored at the last digit result into to palindromes `1` to `99999`
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Then we only need to test these numbers whether they are also binary palindromes.
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