16 lines
448 B
Nim
16 lines
448 B
Nim
import strutils, sequtils, sets, algorithm
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proc reversed(s: string): string =
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result = newString(s.len)
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for i, c in s:
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result[s.high - i] = c
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let
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words = readFile("unixdict.txt").strip().splitLines()
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wordset = words.toHashSet
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revs = words.map(reversed)
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var pairs = zip(words, revs).filterIt(it[0] < it[1] and it[1] in wordset)
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echo "Total number of semordnilaps: ", pairs.len
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pairs = pairs.sortedByIt(it[0].len)
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echo pairs[^5..^1]
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