Legendary Grandmaster

ko_osaga

Jaehyun Koo, Daejeon, South Korea
From KAIST
 
 
 
 
 
 
 
 
2143 problems
solved for all time
122 problems
solved for the last year
25 problems
solved for the last month
13 days
in a row max.
4 days
in a row for the last year
4 days
in a row for the last month