TEHRAN (ISNA)- Iranian students won two gold and two silver medals in the 28th International Olympiad in Informatics, standing in the third position. Ali Behjati and Arash Mahmoudian-Bidgoli won gold and Amir-Mohammad-Dehghan and Parsa Mir-Taheri grabbed silver medals in the competition held in Russia. 81 countries took part in the Olympiad. ...