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The fifth Asia-Pacific Informatics Olympiad took place on Saturday 7 May 2011, and was hosted by the Iran National Olympiad in Informatics (INOI).
| Rank | Name | Color (/100) | Path (/100) | Guess (/100) | Total (/300) | Delegation | Medal |
|---|---|---|---|---|---|---|---|
| 1 | Kensuke Imanishi | 75 | 100 | 30 | 205 | Japan | Gold |
| 2 | Mehran Kholdi | 95 | 95 | 0 | 190 | Iran | Gold |
| 3 | Xuan Wang | 75 | 80 | 15 | 170 | China | Gold |
| 4 | Shogo Murai | 95 | 70 | 5 | 170 | Japan | Gold |
| 5 | Mingda Qiao | 35 | 100 | 30 | 165 | China | Gold |
| 6 | MYUNGWOO CHUN | 75 | 80 | 10 | 165 | Korea | Gold |
| 7 | JIHO LEE | 40 | 50 | 75 | 165 | Korea | Gold |
| 8 | Yunnan Huang | 95 | 60 | 0 | 155 | China | Silver |
| 9 | Zhenduo Cao | 40 | 100 | 15 | 155 | China | Silver |
| 10 | Weijun Sun | 40 | 85 | 25 | 150 | China | Silver |
| 11 | Tsun Au Yeung | 45 | 100 | 0 | 145 | Hong Kong | Silver |
| 12 | Zhaofan Qiu | 80 | 60 | 0 | 140 | China | Silver |
| 13 | Sajad Jalali | 0 | 40 | 95 | 135 | Iran | Silver |
| 14 | SE JUN OH | 100 | 30 | 0 | 130 | Korea | Silver |
| 15 | Kasra Edalatnejad | 20 | 100 | 5 | 125 | Iran | Silver |
| 16 | TAEHYUN LEE | 25 | 100 | 0 | 125 | Korea | Silver |
| 17 | William Gozali | 25 | 80 | 15 | 120 | Indonesia | Silver |
| 18 | Raymond Seng Ing Kang | 25 | 90 | 5 | 120 | Singapore | Silver |
| 19 | Wei En Joseph Lee | 40 | 0 | 80 | 120 | Singapore | Silver |
| 20 | Hubert Hua Kian Teo | 40 | 80 | 0 | 120 | Singapore | Silver |
| 21 | Kinan Sarmini | 20 | 100 | 0 | 120 | Syria | Silver |
| 22 | JEONG MIN PARK | 20 | 80 | 15 | 115 | Korea | Bronze |
| 23 | Chuanqi Shen | 40 | 60 | 15 | 115 | Singapore | Bronze |
| 24 | Ikumi Hide | 40 | 70 | 0 | 110 | Japan | Bronze |
| 25 | Sorawit Suriyakarn | 5 | 100 | 5 | 110 | Thailand | Bronze |
| 26 | JAE EUI MA | 45 | 60 | 0 | 105 | Korea | Bronze |
| 27 | Kazumi Kasaura | 75 | 10 | 15 | 100 | Japan | Bronze |
| 28 | Yusuke Sakata | 40 | 60 | 0 | 100 | Japan | Bronze |
| 29 | Witchakorn Kamolpornwijit | 40 | 60 | 0 | 100 | Thailand | Bronze |
| 30 | Jui-Min Lee | 15 | 80 | 0 | 95 | Taiwan | Bronze |
| 31 | Pasin Manurangsi | 40 | 25 | 30 | 95 | Thailand | Bronze |
| 32 | Hosein Sekhavat | 5 | 80 | 0 | 85 | Iran | Bronze |
| 33 | Che-Yu Wu | 25 | 60 | 0 | 85 | Taiwan | Bronze |
| 34 | Reza Kasnavi | 75 | 0 | 0 | 75 | Iran | Bronze |
| 35 | Liang-Jie Chen | 40 | 35 | 0 | 75 | Taiwan | Bronze |
| 36 | Shuo-Yan Lin | 65 | 0 | 0 | 65 | Taiwan | Bronze |
| 37 | Parsa SaadatPanah | 0 | 60 | 0 | 60 | Iran | Bronze |
| 38 | Tatsuya Kuremoto | 40 | 0 | 20 | 60 | Japan | Bronze |
| 39 | Ray Yan Ang | 5 | 55 | 0 | 60 | Singapore | Bronze |
| 40 | Wei Liang Gan | 55 | 0 | 5 | 60 | Singapore | Bronze |
| 41 | Eliot Courtney | 0 | 55 | 0 | 55 | Australia | Bronze |
| 42 | Shi-Wei Liu | 55 | 0 | 0 | 55 | Taiwan | Bronze |
| 43 | Niel van der Westhuizen | 25 | 0 | 25 | 50 | Australia | Honorable Mention |
| 44 | Felik Junvianto | 40 | 0 | 10 | 50 | Indonesia | Honorable Mention |
| 45 | Wai Pan Yik | 30 | 0 | 15 | 45 | Hong Kong | Honorable Mention |
| 46 | Jessica Handojo | 10 | 15 | 20 | 45 | Indonesia | Honorable Mention |
| 47 | Po-Cheng Chu | 40 | 5 | 0 | 45 | Taiwan | Honorable Mention |
| 48 | Liu Yusan Leung | 40 | 0 | 0 | 40 | Hong Kong | Honorable Mention |
| 49 | Bayasgalan Gantushig | 25 | 0 | 15 | 40 | Mongolia | Honorable Mention |
| 50 | Logan Glasson | 0 | 0 | 40 | 40 | New Zealand | Honorable Mention |
| 51 | Laphonchai Jirachuphun | 20 | 5 | 15 | 40 | Thailand | Honorable Mention |
| 52 | Daniel Goldbach | 0 | 30 | 5 | 35 | Australia | Honorable Mention |
| 53 | Frederikus Hudi | 20 | 0 | 15 | 35 | Indonesia | Honorable Mention |
| 54 | Daniel Agusta | 30 | 0 | 5 | 35 | Indonesia | Honorable Mention |
| 55 | Tony Sun | 25 | 0 | 5 | 30 | New Zealand | Honorable Mention |
| 56 | Thongchai Wirojsakseree | 20 | 5 | 5 | 30 | Thailand | Honorable Mention |
| 57 | Pak Hay Chan | 25 | 0 | 0 | 25 | Hong Kong | Honorable Mention |
| 58 | Naranbayar Uuganbayar | 20 | 0 | 5 | 25 | Mongolia | Honorable Mention |
| 59 | Jamie McCloskey | 25 | 0 | 0 | 25 | New Zealand | Honorable Mention |
| 60 | Navin S. Gunathillaka | 25 | 0 | 0 | 25 | Sri Lanka | Honorable Mention |
| 61 | Veerakan Sinthaveelertmongkol | 25 | 0 | 0 | 25 | Thailand | Honorable Mention |
| 62 | KA KIT SEK | 0 | 0 | 25 | 25 | Macao | Honorable Mention |
| 63 | CHOU LUN LEONG | 25 | 0 | 0 | 25 | Macao | Honorable Mention |
| 64 | SENG PAN KOU | 25 | 0 | 0 | 25 | Macao | Honorable Mention |
| 65 | Robert Newey | 20 | 0 | 0 | 20 | Australia | Honorable Mention |
| 66 | Mochammad Dikra Prasetya | 20 | 0 | 0 | 20 | Indonesia | Honorable Mention |
| 67 | Janchiv Bat-Erdene | 20 | 0 | 0 | 20 | Mongolia | Honorable Mention |
| 68 | Yasith Vidanaarachchi | 20 | 0 | 0 | 20 | Sri Lanka | Honorable Mention |
| 69 | Haidar Abboud | 15 | 5 | 0 | 20 | Syria | Honorable Mention |
| 70 | Abdulbaset Aljoudi | 15 | 0 | 5 | 20 | Syria | Honorable Mention |
| 71 | PUI LAM SI | 20 | 0 | 0 | 20 | Macao | Honorable Mention |
| 72 | Dinesh Giritharan | 10 | 0 | 5 | 15 | Australia | Honorable Mention |
| 73 | On Yin Leung | 10 | 0 | 5 | 15 | Hong Kong | Honorable Mention |
| 74 | Nicholas Melchert | 0 | 15 | 0 | 15 | New Zealand | Honorable Mention |
| 75 | P.G.M. Pallewatte | 0 | 0 | 15 | 15 | Sri Lanka | Honorable Mention |
| 76 | CHEOK KUAN LEONG | 0 | 0 | 15 | 15 | Macao | Honorable Mention |
| 77 | WENG WA UN | 15 | 0 | 0 | 15 | Macao | Honorable Mention |
| 78 | Charlie Somerville | 10 | 0 | 0 | 10 | Australia | Honorable Mention |
| 79 | Amartya Shankha Biswas | 10 | 0 | 0 | 10 | India | Honorable Mention |
| 80 | Fahim Zubayer | 0 | 5 | 0 | 5 | Bangladesh | Honorable Mention |
| 81 | Shantanu Agarwal | 5 | 0 | 0 | 5 | India | Honorable Mention |
| 82 | Hemika Yasinda Kodikara | 5 | 0 | 0 | 5 | Sri Lanka | Honorable Mention |
| 83 | Nour Eldeen Alfanous | 0 | 0 | 5 | 5 | Syria | Honorable Mention |
| 84 | Fadi Dahdouh | 0 | 0 | 5 | 5 | Syria | Honorable Mention |
| 85 | Rafi Salman | 0 | 0 | 5 | 5 | Syria | Honorable Mention |