AND Sorting

bitmasks, constructive algorithms, sortings

Penalty

bitmasks, brute force, dp, greedy

Subsequence Addition (Hard Version)

bitmasks, dp, greedy, implementation, sortings

Patchouli's Magical Talisman

bitmasks, constructive algorithms, greedy, sortings

AGAGA XOOORRR

bitmasks, brute force, dp, greedy

NIT orz!

bitmasks, greedy

a-Good String

bitmasks, brute force, divide and conquer, dp, implementation

Johnny and His Hobbies

bitmasks, brute force

Find The Array

bitmasks, constructive algorithms, greedy

Special Numbers

bitmasks, math

Hamon Odyssey

bitmasks, greedy, two pointers

MIN-MEX Cut

bitmasks, constructive algorithms, dp, greedy

Almost Ternary Matrix

bitmasks, constructive algorithms, matrices

Preparing Olympiad

bitmasks, brute force

ABC String

bitmasks, brute force, implementation

Cirno's Perfect Bitmasks Classroom

bitmasks, brute force

Roof Construction

bitmasks, constructive algorithms

We Need the Zero

bitmasks, brute force

MEXor Mixup

bitmasks, greedy

Binary Cafe

bitmasks, combinatorics, math

Tavas and SaDDas

bitmasks, brute force, combinatorics, implementation

Min Or Sum

bitmasks, greedy

AND 0, Sum Big

bitmasks, combinatorics, math

Rock and Lever

bitmasks, math

Petr and a Combination Lock

bitmasks, brute force, dp

Mr. Perfectly Fine

bitmasks, greedy, implementation

XORwice

bitmasks, greedy, math

XOR Mixup

bitmasks, brute force

Mocha and Math

bitmasks, constructive algorithms, math

Dreamoon and WiFi

bitmasks, brute force, combinatorics, dp, math, probabilities

Sum in Binary Tree

bitmasks, combinatorics, math, trees

And Then There Were K

bitmasks

Fedor and New Game

bitmasks, brute force, constructive algorithms, implementation

Not Quite Latin Square

bitmasks, brute force, implementation

Odd One Out

bitmasks, implementation

Raising Bacteria

bitmasks