Unverified50% confidenceFactExact time
TopCoder was founded in 1997 and is a representative early programming competition platform
1
Sources
50%
Confidence
Long-term
Relevance
9/9/2026
First Seen
Sources
Related Entities
Related Claims
UnverifiedTopCoder was founded in 1997, LeetCode was established in 2011, HackerRank was established in 2011, and Codewars was established in 2012.73% similarUnverifiedFirstClass是一套具有图形化界面的客户端-服务器通信系统，由加拿大公司SoftArc于90年代初推出55% similarUnverifiedXD FirstClass Network是90年代日本关西地区一个基于FirstClass平台构建的BBS社区54% similarUnverifiedBasecamp (originally 37signals) is a software company founded in 1999 whose core products include the project management tool Basecamp and the email client HEY.52% similarUnverifiedCVE was established by MITRE Corporation in 1999 and has become the standard framework for global vulnerability management infrastructure; the CVE identifier format is CVE-YYYY-NNNNN.50% similar
Cite This Claim
Stable URI
https://kongchang.com/claim/881530API
curl https://kongchang.com/api/v1/knowledge/claims/881530MCP
get_claim(id=881530)