Jiangqi Dai has built an impressive reputation in the world of Competitive Programming and Mathematics. Representing China at the International Olympiad in Informatics, competing at the highest levels of Codeforces and AtCoder, and later studying at the Massachusetts Institute of Technology, he has achieved results that place him among the most accomplished young problem solvers of his generation. His record includes a perfect performance at IOI 2022, major AtCoder success, recognition in the William Lowell Putnam Mathematical Competition, and strong results with MIT in the International Collegiate Programming Contest. As of 2026, Jiangqi Dai’s story is especially interesting because his achievements extend beyond one competition or platform.
Quick Bio Information
| Information | Details |
|---|---|
| Full Name | Jiangqi Dai |
| Country | China |
| Birth Year | 2005 |
| Known For | Competitive Programming And Mathematics |
| University | Massachusetts Institute Of Technology |
| Earlier Affiliation | Nanjing Foreign Language School |
| IOI Appearance | 2022 |
| IOI Result | Joint First Place |
| IOI Score | 600/600 |
| IOI Award | Gold Medal |
| AtCoder Handle | tour1st |
| Other AtCoder Handle | djq_cpp |
| Codeforces Handle | OddImage |
| Other Codeforces Handle | GoForIt |
| Highest Listed AtCoder Rating | 3381 On tour1st |
| AtCoder Rank Listed | 7th |
| Putnam Recognition | Two-Time Putnam Fellow |
| 2026 Major Achievement | AtCoder World Tour Finals Algorithm Champion |
| ICPC Connection | MIT Competitive Programming Team |
The birth year, affiliations, handles, AtCoder rating, and ranking are recorded on Jiangqi Dai’s AtCoder profiles, while his IOI and university-related achievements are supported by official competition and MIT records.
Who Is Jiangqi Dai?
Jiangqi Dai is a Chinese Competitive Programmer and Mathematics competitor whose public record is built around high-level problem-solving contests. He became internationally prominent after winning a Gold Medal at IOI 2022 with a perfect score. His later record connects him with MIT, the Putnam Competition, ICPC, Codeforces, and AtCoder. Unlike a traditional celebrity biography, most reliable information about Jiangqi Dai concerns academic and competitive achievements rather than his private life. This makes his competition record the most useful way to understand his development and reputation.
Early Background
Public information about Jiangqi Dai’s childhood and family is limited, and reliable sources do not provide enough evidence to construct a detailed personal biography. His AtCoder profile, however, lists his birth year as 2005 and records Nanjing Foreign Language School as an earlier affiliation. The same profile identifies China as his country or region. These details show that his Competitive Programming ability developed at a relatively young age. It is important not to invent information about his parents, hometown, relationships, or other private matters simply to fill gaps in his biography.
Rise In Competitive Programming
Jiangqi Dai attracted attention in Competitive Programming years before his IOI victory. A 2019 Codeforces community post reported that the account OddImage reached a rating of 3055 at age 14, making him, according to that contemporary post, the youngest Legendary Grandmaster at the time. The same post mentioned success in Asian programming competitions and China’s informatics training system. Because this source is a community post rather than an official biography, those historical descriptions should be presented with proper context. Still, they show how early his programming ability became visible to experienced competitors.
IOI 2022
Jiangqi Dai’s defining school-level achievement came at the International Olympiad in Informatics in 2022. Representing China, he scored the maximum possible 600 points out of 600, earning a Gold Medal and sharing first place with fellow Chinese contestant Shaoxuan Tang. The official IOI statistics record Jiangqi Dai as first out of 349 contestants. Getting every available point across all six tasks is particularly notable because IOI problems are designed to test advanced algorithms, implementation, optimization, and reasoning under strict competition conditions.
Why His Perfect IOI Score Matters
The 600/600 result provides more information than a simple first-place ranking. IOI 2022 involved six scored problems worth 100 points each. Jiangqi Dai received full credit on all of them, reaching 300 points on the first competition day and another 300 on the second. Many elite competitors earn Gold Medals without completing every task perfectly, so a full score demonstrates unusual consistency across different problem types. His performance therefore stands as one of the clearest indicators of his ability to combine mathematical reasoning with accurate algorithm design and implementation.
Codeforces Career
Jiangqi Dai has also been associated with the Codeforces accounts OddImage and GoForIt in Competitive Programming databases. OddImage is particularly significant because of the early Legendary Grandmaster milestone connected with the account. Codeforces ratings change as competitors enter contests, so a rating is best understood as a snapshot rather than a permanent measure of ability. Jiangqi Dai’s broader record is more informative: success across Codeforces, IOI, AtCoder, Mathematics competitions, and ICPC suggests that his problem-solving strength is not tied to only one platform or contest format.
AtCoder Career
AtCoder provides another important part of Jiangqi Dai’s Competitive Programming profile. His tour1st account lists China as his country, MIT as his affiliation, a birth year of 2005, and OddImage as the connected Codeforces ID. The profile has recorded an Algorithm rating of 3381, a highest rating of 3381, and a rank of seventh, placing the account within the top 0.01 percent at the time captured by the source. A separate account, djq_cpp, is also linked with Jiangqi Dai in Competitive Programming records.
AtCoder World Tour Finals
Jiangqi Dai moved from strong online ratings to major championship results at the AtCoder World Tour Finals. Competitive Programming Hall Of Fame records place him third in the 2025 Algorithm final with a score of 3200. In July 2026, competing as tour1st, he went further and won the AtCoder World Tour Finals 2026 Algorithm division. AtCoder’s published results show tour1st in first place with 4300 points, well ahead of the remaining finalists. The result is one of the most important recent achievements in his Competitive Programming career.
MIT And University Life
By his university years, Jiangqi Dai was affiliated with the Massachusetts Institute of Technology. MIT News described him as a first-year student when announcing the results of the 2023 William Lowell Putnam Mathematical Competition, while his current competition profiles also identify MIT as his affiliation. Moving into university competition allowed him to apply the same analytical strengths in new formats, including advanced Mathematics and team-based programming. His MIT record is especially useful for understanding how his competitive career developed after IOI rather than ending with his school-level Gold Medal.
Putnam Mathematics Success
Jiangqi Dai is not only an elite programmer. He has also achieved exceptional results in pure Mathematics. He was named a Putnam Fellow in the 2023 competition, meaning he finished among the five highest-scoring participants in the William Lowell Putnam Mathematical Competition. He repeated the achievement in the 2024 competition, becoming a two-time Putnam Fellow while still an MIT sophomore. Each of the five Putnam Fellows received a $2,500 award in those competitions. Reaching the top five twice highlights mathematical creativity that goes beyond programming speed or knowledge of standard algorithms.
ICPC World Finals
Jiangqi Dai also competed for MIT in the International Collegiate Programming Contest. At the 2024 ICPC World Finals, MIT’s team MIT Isn’t Training, consisting of Jiangqi Dai, Ziqian Zhong, and Zixiang Zhou, solved eight of twelve problems and finished 11th overall. The result earned a Bronze-level placement in the listed standings, and MIT was recognized as North America Champion. ICPC differs from most individual platforms because three students share one computer and must coordinate strategy, coding, debugging, and time management, making teamwork an essential part of success.
2026 North America Championship
Jiangqi Dai continued representing MIT in major team competition during 2026. MIT CSAIL reported that the team Monkey Is Typing, made up of Jiang Cheng, Jiangqi Dai, and Kangyang Zhou, won the 2026 ICPC North America Championship. The team solved 11 of 13 problems and defeated a field of 51 teams from colleges across North America. The victory qualified MIT for the 50th Annual ICPC World Finals scheduled for November 2026. As of September 2026, that World Finals event is still ahead, so any claim about its final result would be premature.
Programming Strengths
Competition records cannot reveal exactly how Jiangqi Dai thinks while solving every problem, but his results suggest a broad combination of skills. A perfect IOI score demands strong knowledge of algorithms and implementation. A very high AtCoder rating requires consistency across difficult timed contests. Putnam success depends heavily on mathematical proof and creative reasoning, while ICPC adds communication and teamwork. AtCoder’s 2026 finalist questionnaire records tour1st as enjoying problems that require interesting observations rather than excessive tedious work, offering a small but useful glimpse into the type of challenges he prefers.
Prize Money
Competitive Programming Hall Of Fame currently lists Jiangqi Dai’s estimated prize money at approximately $8,292.10. Its competition record includes ¥100,000 for third place at the 2025 AtCoder World Tour Finals Algorithm event and ¥1,000,000 for the 2026 victory, alongside team-related prize information from ICPC. Separately, official Putnam records show $2,500 awards associated with each of his two Putnam Fellow results. The Hall Of Fame figure should therefore be described as listed or estimated competition prize money, not as Jiangqi Dai’s total income, wealth, salary, or net worth.
Public Profile
Jiangqi Dai maintains a relatively low-profile public presence compared with athletes or entertainment personalities. Most searchable information comes from competition standings, programming profiles, university reports, and Mathematics results. This actually makes accuracy easier when writing about him: his achievements can be tied directly to recorded scores and rankings. Information about his private family life, personal relationships, exact residence, and finances is not widely documented in reliable public sources. A responsible Jiangqi Dai Biography should therefore focus on his verified academic and Competitive Programming record rather than speculation.
Why Jiangqi Dai Stands Out
What makes Jiangqi Dai especially notable is the variety of elite results he has produced. Winning IOI with a perfect score demonstrates world-class school-level programming. Becoming a Legendary Grandmaster at a young age shows early online success. Two Putnam Fellow honors reveal exceptional Mathematics ability. Strong ICPC performances demonstrate teamwork, while winning the 2026 AtCoder World Tour Finals shows that he remained competitive at the highest individual level years after IOI. Few records can be summarized by one rating or medal; Jiangqi Dai’s career is better understood as sustained excellence across several demanding forms of problem solving.
Final Thoughts
Jiangqi Dai’s Biography is unusual because his reputation is supported by measurable achievements across Programming and Mathematics rather than by publicity. From becoming an elite Codeforces competitor at a young age to achieving a flawless IOI score, succeeding twice as a Putnam Fellow, competing for MIT at the ICPC World Finals, and winning the AtCoder World Tour Finals in 2026, his record shows remarkable range. He remains a young competitor, so his long-term professional direction is still developing. What is already clear is that Jiangqi Dai has established himself as an exceptional problem solver whose achievements span Algorithms, Mathematics, individual contests, and team competition.
FAQs About Jiangqi Dai
Who Is Jiangqi Dai?
Jiangqi Dai is a Chinese Competitive Programmer and Mathematics competitor associated with MIT. He is known for winning a Gold Medal with a perfect score at IOI 2022, becoming a two-time Putnam Fellow, competing in ICPC, and winning the 2026 AtCoder World Tour Finals Algorithm division.
Where Is Jiangqi Dai From?
Jiangqi Dai represents China in his public Competitive Programming profiles and represented China at the International Olympiad in Informatics. His AtCoder profiles also identify his country or region as China.
How Old Is Jiangqi Dai?
His AtCoder profiles list his birth year as 2005. A precise publicly verified birth date is not provided by the reliable sources reviewed here, so stating an exact birthday would go beyond the available evidence.
Did Jiangqi Dai Win IOI?
Yes. Jiangqi Dai shared first place at IOI 2022 and received a Gold Medal. He achieved the maximum possible score of 600/600, finishing first out of 349 competitors according to official IOI statistics.
What Is Jiangqi Dai’s Codeforces Username?
Competitive Programming records associate Jiangqi Dai with the Codeforces usernames OddImage and GoForIt. His AtCoder tour1st profile directly lists OddImage as its Codeforces ID.
What Is Jiangqi Dai’s AtCoder Username?
Two AtCoder accounts are associated with Jiangqi Dai: tour1st and djq_cpp. The tour1st account has recorded a rating of 3381 and was used for his victory in the 2026 AtCoder World Tour Finals Algorithm division.
Does Jiangqi Dai Study At MIT?
Yes. Multiple MIT sources identify Jiangqi Dai as an MIT student, and his AtCoder profile lists MIT as his affiliation. He has represented the university in major academic and Competitive Programming competitions.
What Are Jiangqi Dai’s Biggest Achievements?
His most notable verified achievements include a perfect 600/600 and Gold Medal at IOI 2022, two Putnam Fellow honors, an 11th-place finish with MIT at the 2024 ICPC World Finals, victory at the 2026 ICPC North America Championship, and first place in the 2026 AtCoder World Tour Finals Algorithm division.
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