Problems
Fractional Lotion#6613
Very easy · Number theory · Math
Folded Map#6614
Easy · Implementation · Prefix Sums · Brute force
Furry Nuisance#6615
Easy · Graphs
Fence Orthogonality#6616
Easy · Geometry
Flower Pots#6617
Very hard · Brute force
Frustrated Queue#6618
Hard · Dynamic programming · Combinatorics
Frozen Rose-Heads#6619
Medium · Trees · Greedy algorithms · Depth-first Search
False Sense of Security#6620
Medium · Strings
Bowling Score Assistant#6621
Very hard · Brute force · Implementation
Spectrum#6622
Very hard · Graphs
One Move from Towers of Hanoi#6623
Very easy · Math · Brute force
Four-Tower Towers of Hanoi#6624
Easy · Dynamic programming
Light Switches#6625
Easy · Math · Number theory
Full Board#6626
Easy · Graphs
Centroid of Point Masses#6627
Hard · Geometry
Strings with Same Letters#6628
Very easy · Implementation
Acquaintance#6635
Easy · Games
The twentieth century begins#6637
Easy · Data Structures · Prefix Sums
Mysterious Inscription#6638
Hard · Segment Tree · Prefix Sums
Rainbow Layer Cakes#6639
Hard · Data Structures · Queries
A Scandal in Bohemia#6642
Hard · Graphs
Calling All Programmers#6644
Easy · Implementation
Rocky#6645
Easy · Implementation
Undercut#6646
Very hard · Implementation
Battleships#6647
Very hard · Graphs