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Problems

Combinatorics
Difficulty
Sort by
7090
Toral Tickets
Medium
7245
Binomial Coefficient
Easy
7305
Golden Brick
Easy
7320
k-th Meander
Medium
7321
Records and Cycles
Easy
7341
Number of rectangles
Easy
7439
Combination
Medium
7533
Restaurant Ratings
7695
Algebraic Teamwork
8381
How many numbers
Easy
8551
Sequences
Easy
8595
Dogs and monkeys
Very easy
8616
Triangle Counting
Easy
9102
Secret Santa
Easy
9540
Numbers with different digits
Very easy
9557
Bins and balls
Very easy
9616
Anti-palindromic strings
Very easy
9890
Balls and boxes
Very easy
10283
Cossack Vus and Addition
10313
Sprinklers 2: Return of the Alfalfa
10335
Cow Poetry
10727
Mentors
10746
Козак Вус та додавання
10753
ABC
10760
Трійки
Very hard
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