Codeforces and Polygon may be unavailable from May 23, 4:00 (UTC) to May 23, 7:00 (UTC) due to technical maintenance. ×

Master

F99_ll_H21

Felix Fa, Suzhou, China
711 problems
solved for all time
0 problems
solved for the last year
0 problems
solved for the last month
9 days
in a row max.
0 days
in a row for the last year
0 days
in a row for the last month