Yunchang Guan

@guanyu

Afghanistan, Afghanistan

Joined Jul 2017

World Rank: #33 (276.5 points)

Institution: Institution

Activity over the last year

Effectiveness

 Problems solved
925
 Solutions submitted
24215

Problems

List of solved classical problems:

ABA12C BORW DRINK HPYNOS MIXTURES POWERCAR SUMSUM
ABA12D BOTTOM DRTREE HS08PAUL MKEQUAL PPATH SUMSUMS
ABCD BOXES DRUIDEOI HS10SQFT MKJUMPS PQUEUE SWAPS
ABCDEF BRCKTS DSUBSEQ HUBULLU MKTHNUM PR003004 SYNC13C
ABCPATH BRDGHRD DWARFLOG IAPCR2F MLK PRADIPSUM TANKS
ABSP1 BRIDGE DYNACON1 ICANDIES MMASS PRATA TAP2012A
ABSURD BRKSTRNG DYNACON2 IE1 MMATRIX PRETILE TAP2012B
ACMT BROKEN DYNALCA IE2 MMAXPER PRHYME TAP2012C
ACODE BSHEEP EAGLE1 IGAME MMINPAID PRIME1 TAP2012D
ACPC10A BTCODE_G EASYPROB IGOR MMMGAME PRINT TAP2012E
ACPC10B BUGLIFE EC_CONB IITKWPCE MOD PRMQUER TAP2012F
ACPC10D BUSYMAN EC_MODE IITKWPCH MON2012 PRO TAP2012H
ACPC10E BWORK EC_P IITKWPCI MONODIG PROBLEM4 TAP2013G
ACPC11B BYECAKES EDIST IITKWPCJ MORSE PROFIT TAP2013H
ACQUIRE BYTESE2 EDIT IITKWPCN MOZHCAN PROOT TAP2014B
ACTIV BYTESM2 EGYPIZZA ILKQUERY MOZHSLM PRUBALL TAP2014C
ADABANKET C1LJUTNJ EIGHTS ILKQUERYIII MOZHSLS PSTR TAP2014E
ADACHERY CADYDIST EKO IM MPOINT PSTRING TAP2014F
ADACLEAN CAM5 ELEVTRBL INCARDS MREPLBRC PSYCHON TAP2014G
ADACOINS CANDY EMOTICON INCSEQ MSCHED PSYCHOT TAP2014I
ADACON CANDY3 EMTY2 INS14F MSE06H PT07C TAP2014J
ADACROP CANTON ENIGMATH INS14G MSE06I PT07F TAP2015D
ADACUT CAPCITY EPALIN INS14H MSKYCODE PT07J TAP2015H
ADACYCLE CASHIER EQU2 INTEGER1 MSUBSTR PT07X TAP2015I
ADADUNG CATINV EQUI INTERVAL MTOTALF PT07Y TAP2015J
ADAFIELD CATTACK ESCJAILA INTSUB MTRIAREA PT07Z TAP2016C
ADAFRIEN CBANK ESJAIL INUMBER MUDDY PTIME TAP2016F
ADAFUROW CCHESS ETF INVCNT MUL PYRA TAP2016G
ADAGAME CDC12_H ETFD IOIPALIN MUL2COM QCJ3 TAP2016J
ADAGCD CDOWN EXPEDI IOPC1207 MULSORT QCJ4 TAP2016L
ADAGRAFT CDRSANJ EXPOR JARJAR MULTQ3 QMAX3VN TAXI
ADAINDEX CEQU FACEFRND JEDNAKOS MUSKET QTDIVIDE TAXI2
ADAKOHL CERC07K FACENEMY JGTLE MYQ10 QTREE TBATTLE
ADALIST CERC07S FACT0 JNEXT NABILHACKER QTREE2 TBGAME
ADAMATCH CF25E FACTCG2 JOKER1 NABILISU QTREE4 TDKPRIME
ADAMOLD CGBOY FACTMUL JOSWAP NAJPF QTREE5 TDPRIMES
ADANUM CHAIN FACVSPOW JULKA NAJPWG QTREE6 TEAM2
ADAORANG CHICAGO FAILURE JZPEXT NAKANJ QTREE7 TEMPLEQ
ADAPATH CHOCOLA FAKETSP JZPGYZ NASPRIM QUERYSTR TEST
ADAPLANT CIJEVI FANCY KALTSUM NATALIAG QUEST4 TFRIENDS
ADAPOWER CIRCLE_E FARIDA KAOS NDIV R6PL THRBL
ADAQUEUE CIRU FASHION KATHTHI NDIVPHI RACETIME THREECOL
ADASEQEN CIRUT FASTFLOW KFSTB NDS RANGESUM THREENUMBERS
ADASTRNG CISTFILL FAVDICE KGSS NETADMIN RAONE TIP1
ADASUM CITY2 FCDC KNIGHTS NEXTLEX RATING TIPTOP
ADATEAMS CLEANRBT FCTRL KNMOVE NFACTOR REAYZCODETST TLE
ADATREE CLOPPAIR FCTRL2 KOICOST NG0FRCTN RECTANGL TMSUM
ADAUSORT CLSLDR FENCE1 KOIREP NGCD RENT TOANDFRO
ADAVISIT CMG FIBOSUM KOMPICI NGIRL REPEATS TOE1
ADDREV CMPLS FIBTWIST KOPC12A NGM RIOI_2_3 TOE2
ADFRUITS CNTDO FILRTEST KOSARE NGM2 RMID TORNJEVI
ADRABR CNTINDX FINDPRM KOZE NHAY RMID2 TOSCORE
ADVEDIST CNTPRIME FINDSR KPGAME NICEDAY ROCK TOUR
AE00 COCONUTS FINFRAC KPMAZE NICESEQ ROCKETS TOURIST
AE2A CODECODE FISHER KPRIMESB NINJA2 ROHAAN TPCPALIN
AGGRCOW CODEIT03 FLOWERS KPSUM NINJA3 ROOBOT TRAFFICN
AGPC01G CODERE3 FN16ASGN KQUERY NINJA5 ROOTCIPH TRANSP
AHOCUR CODESPTB FN16CEIL KQUERYO NITK06 RPAR TRANSP2
AIBOHP CODFURY FOXLINGS KURUK14 NITT8 RPLA TREECST
AKBAR COINS FP LABYR1 NITTROAD RPLB TREEDEGREE
AKVQLD03 COLONY FPLAN LAS NOCHANGE RPLC TREEORD
ALCATRAZ2 COMDIV FPOLICE LASER_BEAM NORMA2 RPLL TREEPAL
ALICESIE CONDUIT FREQ2 LASTDIG NOTATRI RPLN TREESUM
ALIEN CORNET FREQUENT LASTSHOT NPC2014F RRANGE TRICOUNT
ALL COT FRND LAZYPROG NPC2015A RRSCHED TRIGALGE
ALLIN1 COT2 FRQPRIME LCA NPC2015D SABBIRGAME TRNGL
ALLIZWEL COT3 FTOUR2 LCMSUM NPC2015F SALMAN TROOPS
ALTSEQ COT4 FUNPROB LCPC11B NPC2016A SAM TRT
ALWFACT COUNT1IT FURYROAD LCPC12F NPC2016C SAMER08A TRVCOST
AMBM COURAGE GAME2 LCS NPC2016E SAMER08D TSUM
AMR10C COURIER GAME3 LCS2 NQUEEN SAMER08F TTM
AMR10G COVER GAMES LCS3 NSQUARE SAS001 TTTABLE
AMR11A CPAIR2 GCDEX LEXSTR NSTEPS SBANK TULIPNUM
AMR11B CPATTERN GCDS LGLOVE NSUBSTR SBETS TWENDS
AMR11D CPCRC1C GCJ082A LIGHTIN NSUBSTR2 SCAVHUNT TWOKINGS
AMR11E CPRIME GCJ101BB LINEGAR NTG SCITIES TWOPATHS
AMR11J CRAN02 GCJ1C09C LINES NTHPRIME SCRAPER TWOPROF
AMR12D CRAN04 GCPC11B LINEUP NTICKETS SCUBADIV TWOSQRS
AMR12I CRDS GCPC11I LIS2 NUMOFPAL SEGSQRSS UCBINTG
ANARC05B CROSSOVER GDCOFTI LISA NUMPATH SELLPHN2 UCV2013B
ANARC05H CRSCNTRY GEOM LITE NUMTSN SELTEAM UCV2013E
ANARC08A CRYPTON GEOPROB LKS NWERC04H SEQ UCV2013H
ANARC08B CRZYSMKR GERGOVIA LMCONSTR NWERC11F SERGEARS UCV2013J
ANARC08F CSTREET GGD LOCKER NWERC11H SERGRID UJ
ANARC09A CTGAME GIRLSNBS LONGCS NY10A SERVICE UJ01
ANDROUND CTRICK GIVEAWAY LOOPEXP NY10E SGAME ULM02
ANGELS CUBEFR GLJIVE LOSTNSURVIVED ODDDIV SGIFT ULM09
ANTP CUBNUM GNY07F LOVEGURU OFFSIDE SHAHBG UOFTAE
ANTTT CUTSQRS GNY07H LPIS OLOLO SHAKILKEYWORD UPDATEIT
APIO10A CVJETICI GNYR09F LQDCANDY ONEZERO SHELF VBOSS
APIO14_A CZ_PROB1 GOALFR LUCIFER ONP SHOP VCIRCLES
APS DAGCNT2 GOC11A LVADER OPCPIZZA SHPATH VECTAR1
APS2 DANGER GOC11B M00PAIR OPTM SHUB1307 VECTAR8
ARBITRAG DAVIDG GONDOR M3TILE ORDERS SICRANO VENOM
ARCTAN DCEPC11B GONE MAIN111 ORDERSET SKY VFMUL
ARDA1 DCEPC11I GOO MAIN112 ORDSUM23 SMILEY1807 VHUFFM
AREA1 DCEPC12G GOODB MAIN75 OTOCI SOCIALNE VISIBLEBOX
ARITH2 DCEPC13D GOODG MAIN8_C PAGAIN SOCNETC VLATTICE
ARMY DCEPC14A GPA1 MAKEMAZE PALDR SOLDIERS VMILI
ARRAYSUB DCEPC206 GRASSPLA MAKETREE PALIN SOLIT VOCV
ASCDFIB DCEPC501 GREED MARBLES PALMKR SOPARADE VOTAS
ASSIGN DCEPC505 GS MARIOGAM PARADOX SORTBIT VPALIN
ASSIST DCEPC706 GSCANDY MARTIAN PARTY SORTOUT WACHOVIA
ATOMS DCEPC810 GSS1 MATCH PATHEADS SPCU WALKROBO
BAD DCEPCA03 GSS2 MATCHING PATHGAME SPIKES WATER
BADXOR DCEPCA09 GSS3 MATHLOVE PATULJCI SPIRALGR WEIRDFN
BALLOON DCOWS GSS4 MATRIX PBOARD SPOINTS WIJGT
BALLOT DECOY GSS5 MATSUM PEBBMOV SPP WILLITST
BALLSUM DETER3 GSS6 MAXLN PERIOD SPRING WORDEQ
BALNUM DICT GSS7 MAXMATCH PERIODNI SQDANCE WORDS1
BANDW DIEHARD GSS8 MAXSUMSQ PERMUT2 SQFREE WOWSUBSTR2
BAT1 DIFERENC GSWORDS MAXWOODS PFDEP SQRBR WPC5E
BAT2 DIGOKEYS HACKING MAXXOR PGCD STABLEMP WPC5G
BDOI16A DISJPATH HACKRNDM MB1 PHIDIAS STAMPS WPUZZLES
BDOI16B DISQUERY HALLOW MBLAST PHONELST STARSBC WSCIPHER
BDOI16E DISTANCE HAMSTER1 MBRACKET PHRASES STC02 WTK
BEADS DISUBSTR HANGOVER MC PIBO STONE2 XMAX
BEENUMS DIV HAROWS MCAMP PIE STPAR XMEN
BENEFACT DIV15 HASHIT MCARDS PIGBANK STRANG XXXXXXXX
BGSHOOT DIV2 HC12 MCHAOS PIHU1 STRLCP XYI
BIGSEQ DIVCNT2 HEADSHOT MCOINS PKPLOL SUBLEX YAPP
BILLIARD DIVCNT3 HELPR2D2 MCQUERY PLAYGAME SUBMERGE YODANESS
BINSTIRL DIVCNTK HERDING MDOLLS PLD SUBS YOSEQ
BITDIFF DIVFACT HG METEORS POKER SUBSEQ ZAMENA
BITMAP DIVREL HIGH MFISH POLEVAL SUBSET ZQUERY
BLCONE DIVSUM2 HIGHWAYS MGLAR10 POLICEMEN SUBST1 ZSUM
BLINNET DONALDO HIPPO MICEMAZE POLYEQ SUBSUMS ZUMA
BLMIRANA DOORSPEN HIST2 MILPATR POLYMUL SUBXOR
BOI7SEQ DOTAA HISTOGRA MINMOVE POLYNOM SUB_PROB
BOI7SOU DP HKNAP MINNUM PON SUMFOUR
BOKAM143SOU DQUERY HONDA MINSTOCK POSTERIN SUMITR
BOMBER DRACULA HORRIBLE MINSUB POSTERS SUMMATION
BOOKS1 DRAGKING HOTELS MISERMAN POUR1 SUMMUL

TODO list of classical problems:

ABSYS BOX DIVSTR IITWPC4F MOBILE2 POLQUERY TAP2012G
ACANVAS BOYSCOUT DNALAB IITWPC4H MOBIVINA POWERUP TAP2014H
ACMAKER BSPRIME DOMINOES ILKQUERY2 MONKK PRIMES2 TAP2015A
ADACITY BST DYZIO ILOVEGEO MOWS PROFILING TAP2015C
ADAPHOTO BUBBLESORT EASYFACT IMPER MOZPWS PTRI TAP2015F
ADATRIP CAKE2 EC_DIVS INCDSEQ MPILOT PWRANDMOD TAP2015K
ADV04F1 CARRHIM EDDIST INGRED MROADS QUEEN TAP2016B
AE2B CATM EIUASSEMBLY INTERVA2 MSTRMND RANGZER2 TAP2016D
AEROLITE CFPARTY EQ2 INVESORT MSTS RESIST TAP2016H
ALCATRAZ3 CHEATING EQBOX INVPHI MTREE RESTACK TEMPERAT
AMBLE CHMAZE EVENFRQ IPL1 MTREECOL RKS TESSER
AMR10D CIRCLEDIV FACT1 JAVAC MULTII ROADS TETRAHRD
AMR10I CIRCLE_H FIBPOL JOCTENIS NAPTIME RP TRENDGCD
AMR11H CLEVER FINDLR JUICE NARHIL SANVI TREX
ANARC07G CLOSEST FLING1 KEQ NEO2 SCALES TRIKA
ANARC08G CMPANS FRACTION KPMATRIX NFURY SCPC11H TRIP
ANARC09B CNTINDX2 FRNDCIRC KPURSUIT NICEBTRE SEQN TSUNAMI
ANARC09F CODESPTI FRSKT KRECT NINJA7 SEQPAR TUTMRBL
ANGRMTST COMCB FTOUR LASTDIG2 NOSQ SLIKAR TWIST
AP2 COMPANYS GASWARS LCS0 NOVICE63 SMALL UFPR14D
ASHMHF CONTEST GCD2 LIFEGAME NPC2014B SMALLM UNICA
AVLVKT COUNT GCDEX2 LIM NPC2015B SNGINT UNTITLE1
BABY COWPIC GCPC11J LOPOV NUMTRY SOLDIER VECTAR11
BACKPACK CRAYON GEN MAIN74 OVGDEL SORTMAC VECTAR5
BACKUP CVXPOLY GHOSTS MAIN8_E OVISLARSUM SPCO VOL
BAT3 CYLINDER GOODA MARYBMW PAIRSUM SPHIWAY VONNY
BDOI16D DBALLZ GOT MAUMAU PARITY SQRROOT WEIGHT
BEMINE DCEPC14H GRAFFDEF MAXOR PARSUMS STEAD WIRELESS
BISHOPS DEADFR GUESSNM2 MEDIAN3 PARTIT STONE WORDCNT2
BLOCK_D DEPEND HABLU MEXICAN PCPC12H STRMATCH WORDRING
BLUNIQ DINGRP HARSHAD MINDIST PERMUT1 SUDOKU XC
BOMB2 DINOSM HELPBOB MINIMAX PIR SUPPER YOUWIN
BOOKWORM DIVCNT1 HXH MINUS PLNDROME TABLE ZNANSTVE
BORING DIVFACT3 ICPCS MMINMAX PLSQUARE TAHSINREC