Problems
Topics
The longest divisible subsequence#264
Easy · Bitsets
LCA#3298
Medium · Graphs · Depth-first Search · Bitsets
Awkward Lights#3462
Hard · Bitmasks · Bitsets · Math · Graphs
False figures#4598
Very hard · Geometry · Data Structures · Bitsets
Cinema tickets#5463
Medium · Dynamic programming · Bitsets
Board Blitz#7316
Hard · Bitwise Operations · Bitsets
Pixels#9706
Hard · Bitsets · Graphs · Math
Quests#11573
Very hard · Dynamic programming · Bitsets · Sorting · Greedy algorithms
The Root of Evil#11697
Very hard · Data Structures · Number theory · Queries · Segment Tree · Bitsets
Simple Problem#12288
Very hard · Graphs · Depth-first Search · Dynamic programming · Bitsets