GNYR09F - Adjacent Bit Counts

COMBAT - Air Combat

INTERVA2 - Interval Challenge

MEXICAN - Mexican Standoff

QUERYSTR - Query Problem

TETRAVEX - Tetravex Puzzle

MINES4 - Four Mines

FISHNET - Fishing Net

弦图

ANARC09A - Seinfeld

ANARC09B - Tiles of Tetris, Not!

ANARC09C - Not So Flat After All

ANARC09D - Hop Do not Walk

ANARC09F - Air Strike

BIRD - Bird or not bird

CT - Counting triangles

DP - Deliver pizza

EQ - Electronic queue

FP - Finding password

GS - Going to school

HOUSES2 - Houses

HSEQ - Heavy Sequences

PHU09H - Buy Your House

PHU09K - Highway Patrol

BSMATH1 - Math with Bases (Easy)

KUTH - Kutevi Hard

SEQUOIA - Sequoiadendron

CPAIR - Counting pairs

线段树

BSMATH2 - Math with Bases

KMOVES - Knight Moves

ISUN1 - LL and ErBao

计算几何 · 旋转卡壳

SERVICEH - Mobile Service Hard

NG0FRCTN - Fractions on Tree

DTPOLY - Divide Polygon

PATULJCI - Snow White and the N dwarfs

NG1FRCTN - Fractions on Tree ( reloaded !)

LASTDIG2 - The last digit re-visited

LPRIME - Primes of Lambda

KSEQ - 123 Sequence

PARADOX - Paradox

ALTPERM - Alternating Permutations

PERMJUMP - Permutation Jumping

ANDROUND - AND Rounds

XORROUND - XOR Rounds

TROOPS - Troops of Sand Monsters

CEOI09TR - Tri

SQFFACT - Square-free Integers Factorization

LENGFACT - Factorial length

FINDMAX - Finding Maximum

FINDPRM - Finding Primes

LCMSUM - LCM Sum

莫比乌斯反演 · 整除分块