Welcome - acm.bjtu

Start at 2018-06-02 17:00:00 End at 2018-06-02 22:00:00

Started 7 years Ended 7 years

cbjtu

#	Origin	Name
A	CodeForces 101669A	Concerts
B	CodeForces 101669B	Bricks
C	CodeForces 101669C	Christmas Tree
D	CodeForces 101669D	Harry Potter and The Vector Spell
E	CodeForces 101669E	Looping Playlist
F	CodeForces 101669F	Binary Transformations
G	CodeForces 101669G	Robots
H	CodeForces 101669H	Cat and Mouse
I	CodeForces 101669I	Tetris
J	CodeForces 101669J	Cunning Friends
K	CodeForces 101669K	Escape Room
L	CodeForces 101669L	Divide and Conquer

Problem A. Concerts ***** Announcement 1 <= k <= 300 1 <= n <= 10^5