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Excel synarthseis - Από {siourock}

exw dyo sthles me xronous (xronos eisodou kai exodoou) kai 8elw na elenxo th plhrothta se ena parking. prepei na brhskw dhladi posa kelia einai auta pou exoun xrono exodou megalutero apo ena sygekrimeno xrono kai xrono eisodou mikrotero apo to sygekrimeno xrono. mipos mporei na boh8eisei kaneis? arxika elega gia count if alla de to katafera