By Abigail Klein Leichman (Israel21C via JNS) Four Israeli teenagers won silver and bronze medals in the 33rd International Olympiad in Informatics. Hosted virtually by the National University of Singapore School of Computing from June 19-25, the IOI attracted some 351 exceptional high school students from 88 countries. Each country can enter a squad of up to four contestants to complete timed tasks in informatics skills such as problem analysis, design of algorithms and data structures, programming and testing. This year marked Israel’s 25th consecutive participation in the IOI, but it was only the second time that all four teammates won medals. Yanir Edri and Gonen Gazit won silver medals. Yoav Katz and Lior Yehezkeli won bronze medals. They all finished 12th grade this year and it was the first time each competed in the IOI. The boys trained at the Future Scientists Center for the Advancement of the Talented and Gifted, run by the Ministry of Education and Bar-Ilan University.  Since 1996, Israel has won seven gold medals, 32 silver medals and 33 bronze medals in the IOI.