Yunchang Guan

@guanyu

Afghanistan, Afghanistan

Joined Jul 2017

World Rank: #27 (306.7 points)

Institution: Institution

Activity over the last year

Effectiveness

 Problems solved
1021
 Solutions submitted
32393

Problems

List of solved classical problems:

ABA12C BOMBER DRINK HORRIBLE MINMOVE POLEVAL SUBXOR
ABA12D BOOKS1 DRTREE HOTELS MINNUM POLICEMEN SUB_PROB
ABCD BORW DRUIDEOI HPYNOS MINSTACK POLYEQ SUMFOUR
ABCDEF BOTTOM DSUBSEQ HS08PAUL MINSTOCK POLYMUL SUMITR
ABCPATH BOXES DWARFLOG HS10SQFT MINSUB POLYNOM SUMMATION
ABSP1 BRCKTS DYNACON1 HUBULLU MISERMAN PON SUMMUL
ABSURD BRDGHRD DYNACON2 IAPCR2D MIXTURES POSTERIN SUMSUM
ACMT BRIDGE DYNALCA IAPCR2F MKEQUAL POSTERS SUMSUMS
ACODE BRKSTRNG EAGLE1 ICANDIES MKJUMPS POUR1 SUPPER
ACPC10A BROKEN EASYPROB IE1 MKTHNUM POWERCAR SWAPS
ACPC10B BSHEEP EC_CONB IE2 MLK PPATH SYNC13C
ACPC10D BTCODE_G EC_MODE IE4 MMASS PQUEUE TANKS
ACPC10E BUGLIFE EC_P IGAME MMATRIX PR003004 TAP2012A
ACPC11B BUSYMAN EDIST IGOR MMAXPER PRADIPSUM TAP2012B
ACQUIRE BWORK EDIT IITKWPCA MMINPAID PRATA TAP2012C
ACTIV BYECAKES EGYPIZZA IITKWPCE MMMGAME PRETILE TAP2012D
ADABANKET BYTESE2 EIGHTS IITKWPCG MOBIVINA PRHYME TAP2012E
ADACHERY BYTESM2 EKO IITKWPCH MOD PRIME1 TAP2012F
ADACLEAN C1LJUTNJ ELEVTRBL IITKWPCI MON2012 PRINT TAP2012H
ADACOINS CADYDIST EMOTICON IITKWPCJ MONODIG PRMQUER TAP2013G
ADACON CAM5 EMTY2 IITKWPCN MORSE PRO TAP2013H
ADACROP CANDY ENIGMATH ILKQUERY MOZHCAN PROBLEM4 TAP2014B
ADACUT CANDY3 EOPERA ILKQUERYIII MOZHSLM PROFIT TAP2014C
ADACYCLE CANTON EPALIN IM MOZHSLS PROOT TAP2014E
ADADIG CAPCITY EQU2 INCARDS MPILOT PRUBALL TAP2014F
ADADUNG CARDSHUF EQUI INCSEQ MPOINT PSTR TAP2014G
ADAFIELD CARINA ESCJAILA INS14A MREPLBRC PSTRING TAP2014I
ADAFRIEN CASHIER ESJAIL INS14C MSCHED PSYCHON TAP2014J
ADAFUROW CATINV ETF INS14F MSE06H PSYCHOT TAP2015D
ADAGAME CATTACK ETFD INS14G MSE06I PT07C TAP2015H
ADAGCD CBANK EXPEDI INS14H MSKYCODE PT07F TAP2015I
ADAGRAFT CCHESS EXPOR INTEGER1 MSUBSTR PT07J TAP2015J
ADAHW CDC12_H FACEFRND INTERVAL MTOTALF PT07X TAP2016C
ADAINDEX CDOWN FACENEMY INTSUB MTREE PT07Y TAP2016F
ADAKOHL CDRSANJ FACT0 INUMBER MTREECOL PT07Z TAP2016G
ADALIST CEPC08B FACTCG2 INVCNT MTRIAREA PTIME TAP2016J
ADAMATCH CEQU FACTMUL INVDIV MUDDY PYRA TAP2016L
ADAMOLD CERC07C FACVSPOW INVPHI MUL QCJ3 TAXI
ADANUM CERC07K FAILURE IOIPALIN MUL2COM QCJ4 TAXI2
ADAORANG CERC07S FAKETSP IOPC1207 MULSORT QMAX3VN TBATTLE
ADAPATH CF25E FANCY JARJAR MULTII QTDIVIDE TBGAME
ADAPET CGBOY FARIDA JEDNAKOS MULTQ3 QTREE TDKPRIME
ADAPLANT CHAIN FASHION JGTLE MUSKET QTREE2 TDPRIMES
ADAPOWER CHASE1 FASTFLOW JNEXT MYQ10 QTREE4 TEAM2
ADAQUEUE CHICAGO FAVDICE JOKER1 NABILHACKER QTREE5 TEMPLEQ
ADARAIN CHOCOLA FCDC JOSWAP NABILISU QTREE6 TESSER
ADASALE CIJEVI FCTRL JULKA NAJPF QTREE7 TEST
ADASEQEN CIRCLE_E FCTRL2 JZPEXT NAJPWG QUE2 TFOSS
ADASTRNG CIRU FENCE1 JZPGYZ NAKANJ QUEEN TFRIENDS
ADASUM CIRUT FIBOSQRT JZPLIT NANO QUERYSTR THRBL
ADATEAMS CISTFILL FIBOSUM KALTSUM NASPRIM QUEST4 THREECOL
ADATREE CITY2 FIBTWIST KAOS NATALIAG R6PL THREENUMBERS
ADAUSORT CLEANRBT FILRTEST KATHTHI NDIV RACETIME TIP1
ADAVISIT CLFLARR FINDPRM KFSTB NDIVPHI RANGESUM TIPTOP
ADDREV CLOPPAIR FINDSR KGSS NDS RAONE TLE
ADFRUITS CLSLDR FINFRAC KNIGHTS NEG2 RATING TMSUM
ADRABR CLZSTRNG FISHER KNMOVE NETADMIN REAYZCODETST TOANDFRO
ADVEDIST CMG FLIB KOICOST NEXTLEX RECTANGL TOE1
AE00 CMPLS FLOWERS KOIREP NFACTOR RENT TOE2
AE2A CNTDO FN16ASGN KOMPICI NG0FRCTN REPEATS TOHMOVE2
AFS CNTINDX FN16CEIL KOPC12A NGCD RIOI_2_3 TORNJEVI
AGGRCOW CNTPRIME FOODIES KOSARE NGIRL RMID TOSCORE
AGPC01G COCONUTS FOXLINGS KOZE NGM RMID2 TOUR
AHOCUR CODECODE FP KPGAME NGM2 ROCK TOURIST
AIBOHP CODEIT03 FPLAN KPMAZE NHAY ROCKETS TPCPALIN
AKBAR CODERE3 FPOLICE KPRIMESB NICEBTRE ROHAAN TRAFFICN
AKVQLD03 CODESPTB FREQ2 KPSUM NICEDAY ROOBOT TRANSP
ALCATRAZ2 CODFURY FREQUENT KQUERY NICESEQ ROOTCIPH TRANSP2
ALICESIE COINS FRND KQUERYO NINJA2 RPAR TREECST
ALIEN COLONY FRNDCIRC KSMALL NINJA3 RPLA TREEDEGREE
ALL COMDIV FRQPRIME KURUK14 NINJA5 RPLB TREEORD
ALLIN1 COMPANYS FTOUR2 LABYR1 NITK06 RPLC TREEPAL
ALLIZWEL CONDUIT FUNPROB LARMY NITT8 RPLL TREESUM
ALONE CORNET FURYROAD LAS NITTROAD RPLN TRICOUNT
ALTSEQ COT GAME2 LASER_BEAM NKDIV RRANGE TRIGALGE
ALWFACT COT2 GAME3 LASTDIG NOCHANGE RRSCHED TRIKA
AMBM COT3 GAMES LASTSHOT NORMA2 SABBIRGAME TRNGL
AMR10C COT4 GCDEX LAZYPROG NOTATRI SALMAN TROOPS
AMR10G COUNT1IT GCDS LCA NPC2014F SAM TRT
AMR11A COURAGE GCJ082A LCMSUM NPC2015A SAMER08A TRVCOST
AMR11B COURIER GCJ101BB LCPC11B NPC2015D SAMER08C TSUM
AMR11D COVER GCJ1C09C LCPC12F NPC2015F SAMER08D TTM
AMR11E CPAIR2 GCPC11B LCS NPC2016A SAMER08F TTTABLE
AMR11J CPATTERN GCPC11I LCS2 NPC2016C SAMTWARR TULIPNUM
AMR12D CPCRC1C GDCOFTI LCS3 NPC2016E SAS001 TWENDS
AMR12I CPRIME GEEKOUNT LEXSTR NQUEEN SBANK TWOGAME
ANARC05B CPRMT GEOM LFM NSQUARE SBETS TWOKINGS
ANARC05H CRAN02 GEOPROB LGLOVE NSTEPS SCALES TWOPATHS
ANARC08A CRAN04 GERGOVIA LIGHTIN NSUBSTR SCAVHUNT TWOPROF
ANARC08B CRDS GGD LIM NSUBSTR2 SCITIES TWOSQRS
ANARC08F CROSSOVER GIRLSNBS LINEGAR NTG SCRAPER UCBINTG
ANARC09A CRSCNTRY GIVEAWAY LINES NTHPRIME SCUBADIV UCV2013B
ANDROUND CRYPTON GLJIVE LINEUP NTICKETS SEGSQRSS UCV2013E
ANGELS CRZYSMKR GNY07F LIS2 NUMOFPAL SELLPHN2 UCV2013H
ANTP CSTREET GNY07H LISA NUMPATH SELTEAM UCV2013J
ANTTT CTGAME GNYR09F LITE NUMTSN SEQ UJ
AP2 CTRICK GOALFR LKS NWERC04H SEQ2 UJ01
APIO10A CUBEFR GOC11A LMCONSTR NWERC11F SERGEARS ULM02
APIO14_A CUBNUM GOC11B LOCKER NWERC11H SERGRID ULM09
APS CUTSQRS GONDOR LONGCS NY10A SERVICE UOFTAE
APS2 CVJETICI GONE LOOPEXP NY10E SGAME UPDATEIT
ARBITRAG CVXPOLY GOO LOSTNSURVIVED ODDDIV SGIFT VBOSS
ARCTAN CWORLD GOODB LOVEGURU OFFSIDE SHAHBG VCIRCLES
ARDA1 CZ_PROB1 GOODG LPIS OIL SHAKILKEYWORD VECTAR1
AREA1 DAGCNT2 GOT LQDCANDY OILCOMP SHELF VECTAR8
ARITH2 DANGER GPA1 LUCIFER OLOLO SHOP VENOM
ARMY DAVIDG GRAFFDEF LVADER ONEZERO SHOP2 VFMUL
ARRAYSUB DCEPC11B GRASSPLA M00PAIR ONP SHPATH VHUFFM
ASCDFIB DCEPC11I GREED M3TILE OPCPIZZA SHUB1307 VISIBLEBOX
ASSIGN DCEPC12G GS MAIN111 OPMODULO SICRANO VISION
ASSIST DCEPC13D GSCANDY MAIN112 OPTM SKY VLATTICE
ATOMS DCEPC14A GSHOP MAIN75 ORDERS SMALL VMILI
BACKUP DCEPC206 GSS1 MAIN8_C ORDERSET SMILEY1807 VOCV
BAD DCEPC501 GSS2 MAKEMAZE ORDSUM23 SNGINT VONNY
BADXOR DCEPC505 GSS3 MAKETREE OTOCI SOCIALNE VOTAS
BALLOON DCEPC706 GSS4 MARBLES PAGAIN SOCNETC VPALIN
BALLOT DCEPC810 GSS5 MARIOGAM PAIRSUM SOLDIER VPL2_BE
BALLSUM DCEPCA03 GSS6 MARTIAN PALDR SOLDIERS WACHOVIA
BALNUM DCEPCA09 GSS7 MATCH PALIN SOLIT WALKROBO
BANDW DCOWS GSS8 MATCHING PALMKR SOPARADE WATER
BAT1 DECOY GSWORDS MATGAME PARADOX SORTBIT WEIRDFN
BAT2 DETER3 HACKING MATHLOVE PARTY SORTOUT WIJGT
BAT3 DICT HACKRNDM MATRIX PATHEADS SPCU WILLITST
BDOI16A DIEHARD HALLOW MATSUM PATHGAME SPIKES WINDVANE
BDOI16B DIFERENC HAMSTER1 MAXLN PATULJCI SPIRALGR WORDEQ
BDOI16E DIGOKEYS HANGOVER MAXMATCH PBOARD SPOINTS WORDS1
BEADS DISJPATH HAP01 MAXSUMSQ PEBBMOV SPP WOWSUBSTR2
BEENUMS DISQUERY HAPPYTL MAXWOODS PERIOD SPRING WPC5E
BEHAPPY DISTANCE HAROWS MAXXOR PERIODNI SQDANCE WPC5G
BENEFACT DISUBSTR HASHIT MB1 PERMUT2 SQFREE WPUZZLES
BGSHOOT DIV HAYBALE MBINGO PFDEP SQRBR WRONG
BIGSEQ DIV15 HC12 MBLAST PGCD STABLEMP WSCIPHER
BILLIARD DIV2 HEADSHOT MBRACKET PHIDIAS STAMPS WTK
BINGO DIVCNT2 HELPR2D2 MC PHONELST STARSBC XMAX
BINPRNUM DIVCNT3 HERDING MCAMP PHRASES STC02 XMEN
BINSTIRL DIVCNTK HG MCARDS PIBO STONE2 XXXXXXXX
BISHOPS DIVFACT HIGH MCHAOS PIE STPAR XYI
BITDIFF DIVREL HIGHWAYS MCIRGAME PIGBANK STRANG YAPP
BITMAP DIVSUM2 HIPPO MCOINS PIHU1 STRLCP YODANESS
BITPLAY DONALDO HIST2 MCQUERY PKPLOL SUBLEX YOSEQ
BLCONE DOORSPEN HISTOGRA MDOLLS PL SUBMERGE ZAMENA
BLINNET DOTAA HKNAP METEORS PLAYGAME SUBS ZQUERY
BLMIRANA DP HLP_RAMS MFISH PLD SUBSEQ ZSEQ
BOI7SEQ DQUERY HOLI MGLAR10 PLNDROME SUBSET ZSUM
BOI7SOU DRACULA HOMEW MICEMAZE PMATRIX SUBST1 ZUMA
BOKAM143SOU DRAGKING HONDA MILPATR POKER SUBSUMS

TODO list of classical problems:

ABSYS BORING DYZIO IITKWPCM MEXICAN POLQUERY TAP2012G
ACANVAS BOX EASYFACT IITWPC4F MINDIST POTHOLE TAP2013E
ACMAKER BOYSCOUT EASYMATH IITWPC4H MINIMAX POWERUP TAP2013J
ADAAPPLE BSPRIME EC_DIVS IITWPC4I MINSEQ POWPOW TAP2014H
ADACITY BST EDDIST ILKQUERY2 MINUS PRIMES2 TAP2015A
ADAGROW BUBBLESORT EIDSALAMI2 ILOVEGEO MLASERP PROFILING TAP2015C
ADALEMON CAKE2 EIUASSEMBLY IMPER MMINMAX PTRI TAP2015F
ADAPHOTO CARRHIM EQ2 INCDSEQ MOBILE2 PWRANDMOD TAP2015K
ADATRIP CATM EQBOX INGRED MONKK RANGZER2 TAP2016B
ADV04F1 CFPARTY EQDIV INTERVA2 MOWS REC TAP2016D
AE2B CHEATING ETFS INVESORT MOZPWS RESIST TAP2016H
AEROLITE CHMAZE EVENFRQ IPL1 MROADS RESTACK TEMPERAT
ALCATRAZ3 CIRCLEDIV FACT1 IRECSQRT MSTRMND RKS TETRAHRD
AMBLE CIRCLE_H FCTRL4 JAN MSTS ROADS TRENDGCD
AMR10D CLEVER FIBPOL JAVAC NAPTIME RP TREX
AMR10I CLOSEST FINDLR JOCTENIS NARHIL RTREE TRIP
AMR11H CMPANS FLING1 JPIX NCOPRIME SANVI TRYCOMP
ANARC07G CNTINDX2 FRACTION JUICE NEO2 SCELL TSUNAMI
ANARC08G CODESPTI FRSKT KEQ NFURY SCPC11H TUTMRBL
ANARC09B COMCB FTOUR KPGRAPHS NINJA7 SEQN TWIST
ANARC09F CONTEST GASWARS KPMATRIX NITT4 SEQPAR UFPR14D
ANGRMTST COUNT GCD2 KPURSUIT NOSQ SHAMAN UNICA
ARITH COWPIC GCDEX2 KRECT NOVICE63 SID UNTITLE1
ASHMHF CRAYON GCJ1C09A LASTDIG2 NPC2014B SLIKAR VECTAR11
AVLVKT CYCLERUN GCPC11J LCS0 NPC2015B SMALLM VECTAR5
BABY CYLINDER GEN LEGO NUMTRY SORTMAC VOL
BACKPACK DBALLZ GHOSTS LIFEGAME OVGDEL SPCO WEIGHT
BACKTPOL DCEPC14H GOODA LOPOV OVISLARSUM SPHIWAY WIRELESS
BDOI16D DEADFR GORELIAN MAIN74 PARITY SQRROOT WORDCNT2
BEMINE DEPEND GUESSNM2 MAIN8_E PARSUMS STEAD WORDRING
BLAMOEBA DINGRP HABLU MAP PARTIT STJEPAN XC
BLLUCK DINOSM HARSHAD MARYBMW PBCGAME STONE YOUWIN
BLOCK_D DIVCNT1 HELPBOB MAUMAU PCPC12H STRMATCH ZNANSTVE
BLUNIQ DIVFACT3 HUSGAME MAXOR PERMPATT SUBSHARD
BNMT DIVSTR HXH MDIGITS PERMUT1 SUDOKU
BOMB2 DNALAB IBIGAME MEANARR PIR TABLE
BOOKWORM DOMINOES ICPCS MEDIAN3 PLSQUARE TAHSINREC