Problems
Almost primes#2609
Very easy · Number theory
Large numbers#2610
Easy · Math
Replace digit#2611
Very easy · Implementation
Cutting into Squares#2612
Very easy · Math
Maximum sum#2613
Easy · Dynamic programming · Implementation
GNCHE-1#2614
Very easy · Math
Archiving#2615
Easy · Implementation
Lost card#2616
Very easy · Math
Birthdays#2617
Very easy · Implementation
The next number#2618
Very easy · Implementation
Lucky ticket 2#2619
Very easy · Brute force
Lemon Tale#2620
Hard · Dynamic programming
King's Tour#2621
Very easy · Graphs
Reliable Nets#2622
Very easy · Graphs
Bisectors#2623
Hard · Geometry · Math · Combinatorics
Warp Speed#2624
Very hard · Dynamic programming
High-Precision Number#2625
Very easy · Implementation
Configurations#2626
Very hard · Dynamic programming
Two Longest Paths#2627
Very hard · Graph network flows · Shortest paths · Graphs
A Minimum Land Price#2628
Very easy · Sorting · Implementation
Hacker's Crackdown#2629
Hard · Bitmasks · Dynamic programming
Shuffle#2630
Very hard · Dynamic programming · Probabilities
Maximum GCD#2631
Very easy · Brute force · Math
Attention!#2632
Very easy · Graphs · Sorting
Cookies#2633
Very hard · Dynamic programming · Constructive Algorithms