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  1. USING: io kernel math math.parser ;
  2.  
  3. readln string>number
  4. 5
  5. >
  6. [ "1" ]
  7. [ "0" ]
  8. if
  9. print
Runtime error #stdin #stdout 0.18s 162368KB
stdin
Standard input is empty
stdout
No suitable arithmetic method
left    f
right   5
generic >