Codeforces and Polygon may be unavailable from December 6, 19:00 (UTC) to December 6, 21:00 (UTC) due to technical maintenance. ×

  • User''s contest rating in Codeforces community Contest rating: 1617 (max. expert, 1657)
  • User''s contribution into Codeforces community Contribution: 0
  • Friend of: 8 users
  • Last visit: 35 hours ago
  • Registered: 6 years ago
  • yuangengqis comments Comments
  • Your talks with yuangengqi Talks | Send message