Yunchang Guan

@guanyu

Afghanistan, Afghanistan

Joined Jul 2017

World Rank: #36 (248.4 points)

Institution: Institution

Activity over the last year

Effectiveness

 Problems solved
846
 Solutions submitted
19607

Problems

List of solved classical problems:

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

TODO list of classical problems:

ACANVAS BSPRIME DOMINOES IITWPC4F MOBIVINA POWERUP TAP2015A
ACMAKER BST DYZIO ILKQUERY2 MONKK PRIMES2 TAP2015H
ADAPHOTO CAKE2 EASYFACT IMPER MOWS PROFILING TAP2015K
ADATRIP CARRHIM EC_DIVS INCDSEQ MOZPWS PSYCHOT TAP2016B
ADAVISIT CATM EDDIST INGRED MPILOT PTRI TAP2016D
ADV04F1 CFPARTY EQ2 INVESORT MROADS PWRANDMOD TAP2016H
AE2B CHEATING EQBOX INVPHI MSTRMND QUEEN TEMPERAT
AEROLITE CIRCLE_H EQUI IPL1 MSTS RANGZER2 TESSER
AKBAR CLEVER ETFD JAVAC MTREE RESIST TRENDGCD
AMBLE CLOSEST EVENFRQ JUICE MTREECOL RKS TREX
AMBM CMPANS FACT1 KOPC12A MUL2COM RMID2 TRIKA
AMR10G CNTINDX2 FCDC KPMATRIX MULTII ROADS TRIP
AMR11H CODESPTI FIBPOL KPURSUIT NAPTIME RP TULIPNUM
ANARC08G COMCB FINDLR KRECT NARHIL SANVI TUTMRBL
ANARC09B COMPANYS FLING1 LCS0 NEO2 SCALES TWIST
ANGRMTST CONTEST FRACTION LIFEGAME NFURY SEQN TWOPATHS
APIO14_A COUNT FRNDCIRC LIM NICEBTRE SEQPAR UFPR14D
ASHMHF COVER FRSKT LOPOV NINJA7 SMALL UNICA
AVLVKT COWPIC FTOUR MAIN74 NOVICE63 SMALLM UNTITLE1
BABY CRAYON GASWARS MAKETREE NPC2014B SNGINT VECTAR11
BACKPACK CUBNUM GCD2 MARYBMW NPC2015B SOLDIER VENOM
BACKUP CVXPOLY GCDEX2 MAXOR NPC2016C SORTMAC VONNY
BAT3 CYLINDER GCPC11J MEDIAN3 NTICKETS SPCO WEIGHT
BDOI16D DBALLZ GEN MEXICAN NUMTRY SPHIWAY WIRELESS
BISHOPS DCEPC11I GOODA MGLAR10 OVGDEL SQDANCE WORDRING
BLOCK_D DEADFR GOT MINDIST PARITY SQRROOT XC
BLUNIQ DEPEND GREED MINIMAX PCPC12H STEAD YOUWIN
BOMB2 DINGRP GUESSNM2 MINSTOCK PERMUT1 STRMATCH ZNANSTVE
BOOKWORM DINOSM HABLU MINSUB PLD SUBS
BORING DIVFACT3 HARSHAD MINUS PLNDROME SUPPER
BOX DIVSTR HELPBOB MMINMAX PLSQUARE TABLE
BOYSCOUT DNALAB ICPCS MOBILE2 POLQUERY TAP2014H