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-77039

two.nim

import strutils
import sets

var frequencies : seq[int]

for line in lines "1.txt":
   frequencies.add(parseInt(line))

var seen = toSet([0])
var current = 0

while true:
  for frequency in frequencies:
    current += frequency

    if seen.contains(current):
      echo(current)
      quit()

    seen.incl(current)