Problems
City Festival#637
Very easy · Math · Dynamic programming
Indivisibility of binomial coefficients#638
Easy · Number theory · Math
Irrational pairwise distances#639
Easy · Constructive Algorithms
Minimax matching#640
Easy · Graphs · Greedy algorithms
Number of quadratic residues#641
Easy · Number theory · Math
Two snails#642
Hard · Graphs
Triangular Room#643
Easy · Combinatorics · Math
S-Grundy game#644
Medium · Dynamic programming
Get equal#645
Hard · Greedy algorithms
Jumps on strip#646
Hard · Math · Brute force
Product of coprimes#647
Hard · Number theory
Divisibility of binomial coefficients#648
Easy · Number theory
Factorial and fourth degree#649
Hard · Number theory · Math
Sum of two squares#650
Hard · Number theory
Storytelling Festival#651
Hard · Greedy algorithms · Implementation
Pairwise different distances#652
Medium · Implementation · Brute force
The triangle#653
Very easy · Geometry
Carrot Dreams#654
Very easy · Geometry
The segments#655
Easy · Geometry
Multiplication Game#656
Easy · Games · Number theory · Dynamic programming
Playing with coins#657
Easy · Games · Dynamic programming
Game strike out#658
Easy · Games
Tree Games#659
Very easy · Games · Trees · Graphs
Warehouse Storage Optimization#660
Very easy · Games · Number theory
Details#661
Very easy · Implementation