Recently added problems
Anton buys a piglet#20
Hard · Greedy algorithms · Binary Search · Constructive Algorithms · Number theory
Pasha is also against "tails"?#19
Easy · Sorting · Math
Bohdan against "tails"#18
Easy · Hashing
Sleepy Sasha is Trouble at the University#17
Very easy · Math
Coordinates#16
Very easy · Math
Rook#15
Very easy · Math
Trivial? Solve It!#14
Medium · Number theory · Math · Prefix Sums
Magic Knights#13
Medium · Combinatorics · Math
Add and Minimize#12
Medium · Greedy algorithms · Sorting
Cossack Vus and Friend at CP Olympiad#11
Easy · Implementation