Question
谞转讜谞讬诐 砖诇讜砖讛 诪注讙诇讬诐 砖拽讜讟专讬讛诐 3, 4, 5. 讛诪注讙诇讬诐 讛拽讟谞讬诐
诪砖讬拽讬诐 诇诪注讙诇 讛讙讚讜诇 诪讘驻谞讬诐, 讘谞拽讜讚讜转 谞讙讚讬讜转 (专讗讛 爪讬讜专). 讛诪注讙诇讬诐
讛拽讟谞讬诐 诪讞诇拽讬诐 讗转 讛诪注讙诇 讛讙讚讜诇 诇诪住驻专 讞诇拽讬诐. 谞讬拽讞 讞诇拽 讗砖专
爪讜专转讜 "诪砖讜诇砖 注拽讜诐", 讻诇讜诪专, 讛讜讗 讻诇讜讗 讘讬谉 砖诇讜砖 拽砖转讜转 砖诇 诪注讙诇讬诐 砖讜谞讬诐. 谞住诪谉 讗转
砖讟讞讜 讘-S, 讜讗转 砖讟讞 讛讞讬转讜讱 砖诇 砖谞讬 讛注讬讙讜诇讬诐 讛拽讟谞讬诐 讘-T. 讞砖讘 讗转 `T/S`
诪砖讬拽讬诐 诇诪注讙诇 讛讙讚讜诇 诪讘驻谞讬诐, 讘谞拽讜讚讜转 谞讙讚讬讜转 (专讗讛 爪讬讜专). 讛诪注讙诇讬诐
讛拽讟谞讬诐 诪讞诇拽讬诐 讗转 讛诪注讙诇 讛讙讚讜诇 诇诪住驻专 讞诇拽讬诐. 谞讬拽讞 讞诇拽 讗砖专
爪讜专转讜 "诪砖讜诇砖 注拽讜诐", 讻诇讜诪专, 讛讜讗 讻诇讜讗 讘讬谉 砖诇讜砖 拽砖转讜转 砖诇 诪注讙诇讬诐 砖讜谞讬诐. 谞住诪谉 讗转
砖讟讞讜 讘-S, 讜讗转 砖讟讞 讛讞讬转讜讱 砖诇 砖谞讬 讛注讬讙讜诇讬诐 讛拽讟谞讬诐 讘-T. 讞砖讘 讗转 `T/S`
Sources:
- Israeli IMO Selection, 2012, Stage A Question 5
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