syy's profile

Name Song Yiyang
School Raffles Institution
Role admin
Country Singapore
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Solved Problems
01knapsack 0405 1402 1503
1609 1821 3nplus1 3nplus1II
4cuts 4russians 4sum 727
7up GSS abbb acorns
addition addition2 addk addone
addsubtract adjacentswaps adjlist adjmatrix
aesthetic aircon airline aliens
aliens_ioi amicablecats ancestor ants
appeal applefarm appletree arcade
area area_noi armpit arrangetoys
arrayfind arraypartition arrayproblem artswap
askonegetonefree assembly assignpaths atm
bacteria badknapsack badnim badpotato
badtree ballgame ballot bananafarm
bananafever bananasmoothie bank banks
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birthday bitaro blanko blocks
bobek bombing bombing2 books
bookshelf boomerangs bore boring
bosses bosubaiko bottle boundedpermutation
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boxoffice bracketex bracketflip brackets
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bucketstacking buffet build bunchlocks
bunnyscore burger burgers buycoke
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cardgame cardgame2 cards cardtrick
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catchingcheaters catfight catgameshow catleap
catlunch catnames catteams cave
ccs celldivision centroid change
changingcolours charges cheerleaders chemistry
chessislands chinese chocolate choochoo
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christmaswall christmaxtrees chunlian circleselection
climatechange clique clockpalindrome clocktower
closedpath closedrooms closingshop cny
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collaboration collectingstamps3 collectmushrooms collectmushrooms2
collectmushrooms3 collectmushrooms4 collectmushrooms5 collectmushrooms6
colorgraph colour colourblind combo
commando commonsubstring compact competition
construct container contestcalc conversations
conversations_easy convexhull cookieclickeralpha copyandpaste
countalp countingagain couples cousin
cp2booksales crypto cuberoot cudak
cups cycling dateornot deathray
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delivery departure deque descsort
destroy diamond dice diesel
digits digitsum dijkstra dinowalk
discharging distribution divisibility divsum
divsum_dec18 dna dna_ioi dogmonkey
doll_noi domine dominoes doodles
dotjoin doubleflip doubletrip doubletrouble
dquery dragonfly dreaming drones
duckduckgo ducknuggetconvention duckwalk duckwander
duckwar duels dyingpolynomial dynamicdiameter
eatcake eating edgeflip eeducation
eelimination eescapism eevacuation eexploration
election elephants employee entropy
entropy2 equals erp escalation
escape escapesadland evenorodd exam
examinations excombo exhibition exoticplants
experimentexplodeexpel explosion exponentiate exponentiate_ex
f7 factories feast feedthewallabies
feelgood fencing fencing2 fenwicktree
ferries fertile fibo fibotree
findandprevent findtree fireandbeary firefighting
firelord fireworks fizzbuzz flamethrower
flappyrabbit flights flipthat flood
flooding floors flowering flybot
foodchain football foreveralone fortunetelling
fourbuckets fractional_knapsack fractionalmultiset fractions
fraud frog3 frogs fruits
fruitsequences fuel fuelstation funfair
funnynim garaza garden garden_ioi05
garden_ioi08 gcd gecko general
generosity gerrymandering gift girlfriend
globalwarming globalwarming_ceoi globalwarming_ex goinghome_agc
goodmorning goodseq goodsubsegments gotoschool
gotoubun graphcraft graphoverflow grassplant
gravity grazing greenbeans greeting
grid gridgame growingtrees guanine
guards guards_ex guessarray guessqueue
gwynethandtree gymbadges hacker hacking
haiku hamster1 happyarrays harbingers
harddisk hashcollision hdb heatwv
hedgehogcrimes_easy hellokitty helloworld helloworld2
hipercijevi historical history hld
hld2 holdinghands hole homeworkextension
hoofpaperscissor horses hotspot housing
hungryrabbits1 hungryrabbits2 hunter hyperoperations
ihate1111 illuminate index indivisibility
inequality2 inequality3 infiniteloop infiniteseq
inheritance inspections installingapps interestring
invasion inversemax inversions iqtest
iqtest2 iqtest3 island ispit
istj jams jedan jjooii2
joke journey3 judgeantibreaker jumper
jumping2 jumpontree jumps justright
kfc kickingshoes killanton knapsack
knapsack2 knightmoves kthsubstring ktupleflip
kusac labels ladybugs lambsrespite
lampposts lasers latex laughter
lazycat lboard lcm lcs
leastround leave leftright lemmas
lemonadestand lengthsort letters letterstamper
levelingup levenshtein lfs lightningrod
lightsflip lineup lineup2 lis
lis_easy ljll ljubomora llis
localexpress logs lol lopov
lostarray love lppfnlcst lppfnlcst2
lppufdsrb lps lratio lualectures
luarulers luckynumbers luckynumbers2 lunchbox
lunchcombo lvm magiccarps magick
magicwand makemst malcolm mamamintaplusa
management mandarins manycolours marathon
marathon_usaco mate math mathtree
maximum medianheap medianstring mememagic
merchant merchant_o mercurypoisoning mergecards
mergers messy mice midas
milkweed minimetro minimum mining
minstack mobitel modsum modules
modulochain molecules moneychanger monochromecat
monopoly moosic more_lca more_lca2
morepaths mountains movingboxes mrbeancurd
mrt mugger multipaths multiple
mushroomfarm naan naptime neckties
nemo network newlottery nian
nicenumber nihonese nis nonboringsequences
notebook nou nprime numberfun
numbergame numbers numericalstrings nutritionist
obstacles obstacletree ohbabyntriples olympicbus
omnomnom omnomnom2 openingshop optimalsubseq
optmilk orangecollector orangeroad oranges2
orchard orchard2 oridance osumnjiceni
outing packaging packingpests padoru
paint pairs pairs_atcoder pairsums
palindromicfever palindromicfizzbuzz pancake pandacity
pandaeyes pandaski papaya parade
partitiongame party pascal password
pavement pawns payraise peakfinding
peddler pekora penguinfood penguinislands
perfectprimes performance persistentlists picnic
pigeonhole pigeonnests pigeons pillars
pilot ping pizzeria placingrouters
plagia planning poi pokeadd
pokenumbers poklon ponteng postcard
potatoqueue potatosalad potatotree potionseasy
potionshard power powersupply pplow
prefixgcd prefixsums prefixsums2 pressstart
prime primefactorization primepie primesort
prisoners problematicjourney progression promotion
psle purplecandy pushups puttingstrings
pythonindentation quality qualitycontrol queuestack
quillvsowl rabbitbars rabbitbridges rabbiteatrabbit
rabbitgifts rabbitlineup rabbitmeeting rabbitmilk
rabbitpainting rabbitplane rabbitroad rabbittolls
race radiance radioactive ragingthunder
railway rainbowrabbit rainbowroad rank
rarsum rarwall ratar rating
razlika rblock reading rebuild
reciprocals rectangleoutline redblacktree relaymarathon
relutree removeedges removeelements removemq
replacedigits republiccity restaurant riggedroads
rightangtri rmaxq rmq roadsideadverts
robobear robot2 robots rolling
rootedlca roots rotarylock routers
routes routine royalguards rubies
runway sailor sale samelength
sandcity sandd sardines sawmills
scalars scanner schedule scrivener
sealevel secret seedflare segmentoperations
segmenttree segmenttree2 segmenttree3 selectingintervals
selfdefence selfpermutation sequence_apio sherlockinversions
shikandgame shoes shopping shortest
shuffling sightseeing sightseeing2 simcity
simp simplebridges simpletask singlefile
singleflip skillmoves skyline skyscraper_apio15
smallprimes smallprimes_ex smurf smurfberries
smurfpaths snack snail snakecode
snakenladder snakesnack snakesnack2 snapknack
snowball snowcow snukethewizard socialdistance
socks solarstorm solonim sort
sortbooks sortedandsorted spaceinvaders speakers
special spellofweakness spiderweb splithunny
spy square_ioi squarerect squidzofrenzic
stackweights stamps stations stepgame
sterilizing stickytape stones stonk
stories straight strawberry stringsofimpurity
subgraphs subknapsack subtaskstitching subwaytrip
suffixarray sumint summarising2020 summarizing2021
summit supermarket supertrees supperbox
supplies surnames swap swapsort
swayingflowers swimming switches2 switches998244353
swords synchronization taxcollection telephone
tents thanossort thanossort_st4 threetowers
thunderstorm tiles timeexam toblerone
toll topical tour tourist
towerdefense towers towers_noi toy
train train_ex trains trains_mco
transform travel treecutting treepruning
treepruning2 triangles trianglesum triusis
trivialmaths trivialmaths2 troubles truck
twomeals typicalstairs typo ufo
ultimateifelse umbrella uniquenumbers uniquepath
universe unluckyfloors unmerge vainish
variety veryeasyproblem village visitingsingapore
volcanic voting votingcities vouchers
wabbit wabbitosu wabot walking
wall wallabyhop wallabyland wallisstop
wandering warp watching weddingcoins
weightedguess werewolf wires wiring
wombats woodcutter workload workload2
workload_ex workoutplan wormholes xmas
xorb xorreplace xortree youngmaids
zooqueue