Cassidy Kyler Tan

Cassidy Kyler Tan is a Filipino competitive programmer who represented the Philippines at the International Olympiad in Informatics in 2022 and 2023. He earned an Honourable Mention at IOI 2022 and then a Silver Medal at IOI 2023, then the country's best-ever result at the contest. He was introduced to programming in Grade 6, self-taught C++, and joined NOI.PH in Grade 9. After attending Ateneo de Manila Senior High School, he went on to represent De La Salle University, competing at the ICPC 2025 World Finals with team Kuuhaku.

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• Competed on De La Salle University's team 'Kuuhaku' at the ICPC 2025 World Finals (ranked 48th), placing him among the top collegiate programmers in the country after his high-school IOI run.Sep 4, 2025
• Won Silver at IOI 2023 (Szeged, Hungary), 65th of 350 with 250.5/600 - the Philippines' best finish; first exposed to programming in Grade 6 and self-taught C++ after HTML in school.Sep 4, 2023
• Was a Grade 12 student at Ateneo de Manila Senior High School when he won the 2023 silver; by 2025 he was competing for De La Salle University, indicating he enrolled at DLSU for college.Aug 15, 2023
• Earned Honourable Mention at IOI 2022 (Yogyakarta, Indonesia), 197th of 349 with 129/600 - a two-year arc from HM to silver that made him a mainstay of the Philippine IOI team.Aug 15, 2022
• Teammates on the Philippine IOI squads: Raphael Dylan Dalida and Frederick Ivan Tan (2022), John Lloyd Allas and Jerome Austin Te (2023), and Filbert Ephraim Wu (both years).Aug 15, 2023
• Handles Codeforces as 'DippleThree'; also listed under that handle on the Competitive Programming Hall of Fame alongside his IOI results.
• NOI.PH team bio describes him as first joining NOI.PH in Grade 9 after hearing about it in Python class, and outside informatics he enjoys Dungeons & Dragons sessions with friends.Aug 6, 2022