polyda's profile

Name Ruichen Xu
School NUSH
Role member
Country Singapore
View Submissions
Solved Problems
01knapsack 3nplus1 3nplus1II 4sum
GSS addictiontoworry addition addition2
adjlist adjmatrix ancestor area
area_noi arrayfind arrayproblem ballot
bananasmoothie barbecue beareatrabbit bestplace
binarycoins binarysearch boundlessboxes boxispull
bracketex breakfast brick buffet
candymountain_ex card carpark catfight
catlunch ccs childvschild choosingcandies
christmaxtrees closedrooms coinbag coincombinations
coins competition contestcalc conversations_easy
countalp cuberoot cups deccourse2025
descsort diamond doll_noi drones
duckbuttons duckhunt duckhunt22 duckhunt23
duckhunt29 duckhunt30 duckhunt38 duckhunt4
duckhunt5 dyingpolynomial dystopia eevacuation
eight employee entropy erp
evenorodd exam exponentiate factorial_easy
fibo fibo_easy findingpavement fireandbeary
fizzbuzz flamethrower flip flybot
foodchain foreveralone fractions fuel
gcd gecko gfriendmania gift
givinggifts globalwarming goodbye gotoschool
greeting grid gridgame guanine
guessqueue hacking hamster1 heatwv
hello helloworld hipercijevi hld_easy_2
hoofpaperscissor installingapps_ex inversions ippt
jamestreet jumpontree kangaroohunt knightmoves
lcs leave leenbeetree leftright
lemonade lengthsort letters levelingup
lightningrod lineup lis lis_easy
littlejohnny0 ljubomora logs lualectures
lunchbox lvm magicwand maintainsum
makingparallelograms management maximum medianstring
milkweed minimum minstack missingnumber
moneychanger monkeyjourney monsters nerdchef
nprime numberspiral openingshop0 paint
pairsums pandaeyes papaya party
pascal penguinmountain pigeonhole pigeons
ping platonic27 platonic28 platonic29
postcard potatosalad potatotree prefixsums
prime primesort priorityqueue psle
pushups rabbitmilk railway rangerangequery
rank razlika reciprocals reversiblecampaign
rightangtri rmaxq roadconstruction robotbombs
robotonring1 sandd scalars segmenttree
segmenttree2 shamelessad3 simp skillmoves
smurf smurfpaths snapknack sorting2
splithunny squidzofrenzic staircase stepgame
stringsofimpurity subgraphs subtaskstitching sum
sumint summit sumofdigits supplies
swapsort swords taxcollection timeexam
tourist_noi trainorbus trains twomeals
typicalstairs typo umbrella uniquenumbers
uniquenumbers_easy veryeasyproblem videogames wabot
waterbomb weddingcoins whiteboardgame woodcutter
workoutplan xmas xorinversions zooqueue