Yunchang Guan

@guanyu

Afghanistan, Afghanistan

Joined Jul 2017

World Rank: #88996 (0 points)

Institution: Institution

Activity over the last year

Effectiveness

 Problems solved
0
 Solutions submitted
81797

Problems

List of solved classical problems:

TODO list of classical problems:

AAC2 BLOPER DIVFACT4 HOTELS MINSTACK POTHOLE SUDOKU
ABA12C BLUNIQ DIVISER9 HPYNOS MINSTOCK POUR1 SUFEQPRE
ABA12D BNMT DIVISION HRSIAM MINSUB POWERCAR SUMFOUR
ABA12E BOI7FEN DIVREL HS08PAUL MINUS POWERUP SUMITR
ABCD BOI7SEQ DIVSEQ HS09EQ MINVEST POWPOW SUMMATION
ABCDEF BOI7SOU DIVSTR HS10SQFT MISERMAN POWPOW2 SUMMUL
ABCPATH BOKAM143SOU DIVSUM2 HUBULLU MIXTURES POWTOW SUMPRO
ABSP1 BOMARBLE DNALAB HUSGAME MKEQUAL PPATH SUMSUM
ABSURD BOMB2 DOMINO8 HXH MKJUMPS PPBRJB SUMSUMS
ABSYS BOMBER DOMINOES IAPCR2D MKPAIRS PPR SUPPER
ACANVAS BOOKCASE DONALDO IAPCR2F MKTHNUM PQUEUE SWAPS
ACMAKER BOOKS1 DOORSPEN IBIGAME MKUHAR PR003004 SWTHIN
ACMT BOOKWORM DOTAA ICANDIES MLAND PRADIPSUM SYNC13C
ACODE BOPERISH DP ICPCS MLASERP PRATA TABLE
ACPC10A BORING DQUERY IE1 MLK PRETILE TAHSINREC
ACPC10B BORW DRACULA IE2 MMAHWIRE PRHYME TAKIN
ACPC10C BOTTOM DRAGKING IE4 MMASS PRIME TANKS
ACPC10D BOWLING1 DRINK IEEEBGAM MMATRIX PRIME1 TAP2012A
ACPC10E BOX DRTREE IFCHAIN MMAXPER PRIMES2 TAP2012B
ACPC10G BOXES DRUIDEOI IGAME MMINMAX PRIMEZUK TAP2012C
ACPC11B BOYSCOUT DSUBMTR IGOR MMINPAID PRIMIT TAP2012D
ACPC13 BPM DSUBSEQ IITD4 MMMGAME PRINT TAP2012E
ACQUIRE BRCKTS DTPOLY IITKWPCA MMOD29 PRMFN TAP2012F
ACTIV BRDGHRD DUKKAR IITKWPCC MOBILE2 PRMQUER TAP2012G
ADAAPHID BREAK DWARFLOG IITKWPCD MOBIVINA PRO TAP2012H
ADAAPPLE BRIDGE DYNACON1 IITKWPCE MOD PROBLEM4 TAP2013E
ADABANKET BRKSTRNG DYNACON2 IITKWPCG MODSEQ PROFILING TAP2013G
ADABERRY BROKEN DYNALCA IITKWPCH MOHIB PROFIT TAP2013H
ADABLOOM BRPAR DYZIO IITKWPCI MOHIBPIZ PROOT TAP2013I
ADABRANC BSHEEP EAGLE1 IITKWPCJ MOLE PRUBALL TAP2013J
ADACABAA BSPRIME EASYFACT IITKWPCM MON2012 PSTR TAP2014B
ADACAROT BST EASYMATH IITKWPCN MONKK PSTRING TAP2014C
ADACHERY BTCODE_A EASYPIE IITWPC4D MONO PSWITCH TAP2014E
ADACITY BTCODE_G EASYPROB IITWPC4F MONODIG PSYCHON TAP2014F
ADACLEAN BUBBLESORT EC IITWPC4H MONONUM PSYCHOT TAP2014G
ADACOINS BUD13TLF EC_CONB IITWPC4I MOON1 PT07C TAP2014H
ADACON BUGLIFE EC_DIVS ILKQUERY MORSE PT07D TAP2014I
ADACROP BURGLARY EC_ESTA ILKQUERY2 MOWGLI PT07F TAP2014J
ADACROW BUSINESS EC_MODE ILKQUERYIII MOWS PT07J TAP2015A
ADACUT BUSYMAN EC_P ILOVEGEO MOZHCAN PT07X TAP2015B
ADACYCLE BUZZ EDDIST IM MOZHSLM PT07Y TAP2015C
ADADIG BUZZW EDIST IMPER MOZHSLS PT07Z TAP2015D
ADADUNG BVAAN EDIT IMPORT MOZPWS PTIME TAP2015F
ADAFENCE BWIDOW EGYPIZZA INCARDS MPILOT PTRI TAP2015G
ADAFIELD BWORK EIDSALAMI2 INCDSEQ MPOINT PUCMM210 TAP2015H
ADAFIMBR BYECAKES EIGHTS INCPOWK MPOLEVAL PUCMM223 TAP2015I
ADAFRIEN BYTESE1 EIUASSEMBLY INCSEQ MPOLY PUCMM334 TAP2015J
ADAFTBLL BYTESE2 EKO INDIPROG MROADS PUTNIK TAP2015K
ADAFUROW BYTESM2 ELCS INGRED MSCHED PWRANDMOD TAP2016B
ADAGAME C1LJUTNJ ELEVTRBL INS14A MSE06H PYRA TAP2016C
ADAGAME2 CABLETV EMOTICON INS14C MSE06I QCJ3 TAP2016D
ADAGAME4 CAC EMTY2 INS14F MSE07E QCJ4 TAP2016E
ADAGAME5 CADYDIST EMTY3 INS14G MSKYCODE QMAX3VN TAP2016F
ADAGCD CAKE2 EN INS14H MSTICK QN01 TAP2016G
ADAGRAFT CAKE3 ENIGMATH INTEGER1 MSTRMND QTDIVIDE TAP2016H
ADAGROW CAM5 EOPERA INTERVA2 MSTS QTGIFT1 TAP2016I
ADAHACK CANDN EPALIN INTERVAL MSUBSTR QTREE TAP2016J
ADAHW CANDY EQ2 INTSUB MTOTALF QTREE2 TAP2016K
ADAINDEX CANDY3 EQBOX INUMBER MTREE QTREE4 TAP2016L
ADAJOBS CANPR EQDIV INVCNT MTREECOL QTREE5 TAXI
ADAKOHL CANTON EQU2 INVDIV MTRIAREA QTREE6 TAXI2
ADALEMON CAPCITY EQUI INVESORT MUDDY QTREE7 TBATTLE
ADALICI CARDSHUF ESCJAILA INVPHI MUL QUADAREA TBGAME
ADALIST CARINA ESJAIL IOIPALIN MUL2COM QUEEN TDKPRIME
ADAM1 CARRHIM ETF IOPC1207 MULSORT QUERYSTR TDPRIMES
ADAMATCH CASHIER ETFD IPAD MULTII QUEST4 TEAM2
ADAMOLD CATER ETFS IPL1 MULTQ3 QUEST5 TEMPERAT
ADANUM CATINV EVENFRQ IRECSQRT MUSKET QUILT TEMPLEQ
ADAORANG CATM EXPAND ISAB MYQ10 R6PL TESSER
ADAPATH CATTACK EXPEDI IWGBS MZVRK RACETIME TEST
ADAPET CBANK EXPOR JAN NABILHACKER RAIN1 TETRA
ADAPHOTO CCHESS FACEFRND JARJAR NABILISU RANDMOD TETRAHRD
ADAPICK CCOST FACENEMY JAVAC NACCI RANGESUM TETRIS3D
ADAPLANT CDC12_H FACT0 JC15A NAJ0001 RANGZER2 TFOSS
ADAPOWER CDOWN FACT1 JGTLE NAJGC RANJAN02 TFRIENDS
ADAQUEUE CDRSANJ FACT2 JMFILTER NAJKRACI RAONE THECODE
ADARAIN CEOI09TR FACTCG2 JNEXT NAJPF RATING THEWAR
ADAROBOT CEPC08B FACTMODP JOCHEF NAJPWG RCB THRBL
ADASALE CEQU FACTMUL JOCTENIS NAKANJ REAYZCODETST THREECOL
ADASALES CERC07B FACTMULN JOKER1 NANO REC THREENUMBERS
ADASEQEN CERC07C FACVSPOW JOLLYKINGDOM NAPTIME RECTANGL THRSUM
ADASQR CERC07K FAILURE JOSWAP NARHIL REDARR2 TIP1
ADASTRNG CERC07L FAKETSP JPIX NASPRIM RELINETS TIPTOP
ADASUM CERC07S FALTAENV JRIDE NATALIAG RENT TJANDRAS
ADATEAMS CF25E FANCY JUICE NAUGHTY REPEATS TLE
ADATOMAT CFPARTY FARIDA JULKA NCOPRIME RESIST TMSUM
ADATREE CGBOY FASHION JUSTAPAL NDIV RESTACK TOANDFRO
ADATRIP CHAIN FAST2 JZPCIR NDIVPHI REVFIB TOE1
ADAUNIQ CHAIR FASTFLOW JZPEXT NDIVPHI2 RGBRED TOE2
ADAUSORT CHAOS_CC FAVDICE JZPGYZ NDS RIOI_2_3 TOHMOVE2
ADAVISIT CHASE FBTOURS JZPLIT NDT RIOI_3_2 TOHU
ADAZOO CHASE1 FCANDY JZPSTA NECKLACE RKS TOP10
ADDREV CHEATING FCDC KALTSUM NEG2 RMID TOPOLAND
ADFRUITS CHICAGO FCTRL KAOS NEO2 RMID2 TORNJEVI
ADRABR CHMAZE FCTRL2 KATHTHI NETADMIN RNG TOSCORE
ADV04F1 CHOCOLA FCTRL4 KDOMINO NEXTLEX ROADS TOUGH
ADVEDIST CHUNK2 FEAST KEQ NFACTOR ROADTRIP TOUR
AE00 CIJEVI FENCE1 KFSTB NFURY ROBBERY2 TOURIST
AE2A CIRCLEDIV FERT21_0 KGSS NG0FRCTN ROBOTGRI TOURS
AE2B CIRCLE_E FIBHARD KINDERPC NGCD ROCK TPC07
AE5B2 CIRCLE_H FIBOSQRT KITROB NGIRL ROCKETS TPGA
AEROLITE CIRU FIBOSUM KMEDIAL NGM ROHAAN TRAFFICN
AFS CIRUT FIBPOL KMSL4B NGM2 ROOBOT TRANCLS
AGGRCOW CISTFILL FIBTWIST KNIGHTS NHAY ROOTCIPH TRANSP
AGPC01G CITY2 FILRTEST KNMOVE NICEBTRE RP TRANSP2
AHOCUR CLCKBAIT FINDLR KOICOST NICEDAY RPAR TREASURY
AIBOHP CLEANRBT FINDPRM KOILINE NICESEQ RPLA TREECST
AKBAR CLEVER FINDSR KOIREP NINJA2 RPLB TREEDEGREE
AKVQLD03 CLFLARR FINFRAC KOMPICI NINJA3 RPLC TREEISO
ALCATRAZ2 CLOCKS FISHER KONSTRAKSCHION NINJA5 RPLD TREEORD
ALCATRAZ3 CLONE FISHNET KOPC12A NINJA7 RPLL TREEPAL
ALCATRAZ4 CLOPPAIR FLIB KOPC12B NITK06 RPLN TREESUM
ALICE CLOSEST FLING1 KOPC12G NITT1 RRANGE TRENDGCD
ALICESIE CLSLDR FLOWERS KOPC12H NITT4 RRSCHED TREX
ALIEN CLZSTRNG FN16ASGN KOSARE NITT8 RSHIFT TRGRID
ALIENS CMEXPR FN16CEIL KOZE NITTROAD RTREE TRIBE2
ALL CMG FN16DIET KPGAME NKDIV RTREE3 TRICENTR
ALLIN1 CMPANS FN16RIVER KPGRAPHS NNUM RUNAWAY TRICOUNT
ALLIZWEL CMPLS FNRANK KPMATRIX NOCHANGE SABBIRGAME TRIGALGE
ALONE CNTDO FONTSIZE KPMAZE NORMA2 SALMAN TRIKA
ALTSEQ CNTINDX FOODIES KPOWERSUM NOSQ SAM TRIP
ALWFACT CNTINDX2 FOXLINGS KPRIMES2 NOTATRI SAMBOX TRIPINV
AMBIG CNTPRIME FPLAN KPRIMESB NOVICE43 SAMER08A TRNGL
AMBLE CNURI18H FPOLICE KPSUM NOVICE63 SAMER08C TROOPS
AMBM COCONUTS FRACTION KPURSUIT NPC2014A SAMER08D TRSTAGE
AMR10A CODCHESS FREQ2 KQUERY NPC2014B SAMER08E TRT
AMR10C CODECODE FREQUENT KQUERY2 NPC2014F SAMER08F TRVCOST
AMR10D CODEIT03 FRND KQUERYO NPC2015A SAMER08G TRYCOMP
AMR10G CODEM4 FRNDCIRC KRECT NPC2015B SAMTWARR TSHOW1
AMR10I CODERE3 FRNDZND KSMALL NPC2015D SANVI TSUM
AMR11A CODESPTB FROGPARTY KTH_INDEX NPC2015F SAS001 TSUNAMI
AMR11B CODESPTI FRQPRIME KULE NPC2016A SAS002 TTM
AMR11D CODFURY FRSKT KURUK14 NPC2016C SBANK TTOP
AMR11E CODING2 FSEATS LABYR1 NPC2016E SBETS TTTABLE
AMR11H COINS FTOUR LARMY NQUEEN SBO TUG
AMR11J COLONY FTOUR2 LAS NSQUARE SCALE TULIPNUM
AMR12A COLORSEG FUNFACT LASER_BEAM NSTEPS SCALES TURNLT
AMR12D COMCB FUNPROB LASTDIG NSUBSTR SCAVHUNT TUTMRBL
AMR12I COMDIV FURYROAD LASTDIG2 NSUBSTR2 SCELL TWENDS
AMZRCK COMPANYS GALACDIV LASTSHOT NSYSTEM SCITIES TWENTYQ
AMZSEQ CONDUIT GAME2 LAZYPROG NTG SCPC11B TWINSNOW
ANARC05B CONNECT GAME3 LCA NTHPRIME SCPC11H TWIST
ANARC05H CONSEC GAMES LCMSUM NTICKETS SCRAPER TWOGAME
ANARC05I CONTEST GANNHAT LCPC11B NUMGAME SCUBADIV TWOKINGS
ANARC07C CORNET GARDENAR LCPC12F NUMOFPAL SEGMENTS TWOPATHS
ANARC07G COT GASWARS LCS NUMPATH SEGSQRSS TWOPROF
ANARC07J COT2 GCD2 LCS0 NUMPLAY SELECTION TWOSQRS
ANARC08A COT3 GCDEASY LCS2 NUMTRY SELLPHN2 UCBINTC
ANARC08B COT4 GCDEX LCS3 NUMTSN SELTEAM UCBINTG
ANARC08F COUNT GCDEX2 LDP NWERC04H SEQ UCI2009D
ANARC08G COUNT1IT GCDMAT LEGO NWERC11F SEQ2 UCODES
ANARC08H COUNTDIO GCDMAT2 LEXSTR NWERC11H SEQN UCV2013A
ANARC08I COURAGE GCDS LFM NWERC11J SEQPAR UCV2013B
ANARC09A COURIER GCJ082A LGLOVE NY10A SERGEARS UCV2013E
ANARC09B COVER GCJ08C LIFEGAME NY10E SERGRID UCV2013H
ANARC09F COVER2 GCJ101BB LIGHTIN ODDDIV SERVICE UCV2013I
ANARC09G COWCAR GCJ101C LIM OEN SETNJA UCV2013J
AND COWPIC GCJ1C09A LINEGAR OFFSIDE SFN UFPR14D
ANDROUND CPAIR GCJ1C09C LINES OIL SGAME UJ
ANGELS CPAIR2 GCJ2012C LINEUP OILCOMP SGIFT UJ01
ANGRMTST CPATTERN GCPC11A LIS2 OKRET SHAHBG ULM02
ANTP CPCRC1C GCPC11B LISA OLOLO SHAKILKEYWORD ULM09
ANTTT CPDUEL5A GCPC11H LITE OMWG SHAKTI UNICA
AP2 CPRIME GCPC11I LITELANG ONBRIDGE SHAMAN UNTITLE1
APIO10A CPRMT GCPC11J LITEPIPE ONEZERO SHELF UNTITLED
APIO14_A CRAN02 GDCOFTI LKS ONORIVER1 SHINCARD UOFTAE
APM CRAN04 GEEKOUNT LMCONSTR ONP SHOP UPDATEIT
APS CRAYON GEN LOCKER OPCPIZZA SHOP2 URJC2_F
APS2 CRAZYSK GEOM LONGCS OPMODULO SHPATH VBOSS
ARBITRAG CRDS GEOPROB LOOPEXP OPTM SHUB1307 VCIRCLES
ARCTAN CROSSOVER GERGOVIA LOPOV ORDERS SICRANO VECTAR1
ARDA1 CRSCNTRY GF2 LOSTNSURVIVED ORDERSET SID VECTAR10
AREA1 CRYPTO2 GGD LOTGAME ORDSUM23 SINEGGS VECTAR11
ARITH CRYPTON GHOSTS LOVEGURU ORGNZ SITB VECTAR4
ARITH2 CRZYSMKR GIRLSNBS LPIS OTOCI SKEY VECTAR5
ARMY CS GIVEAWAY LQDCANDY OVGDEL SKY VECTAR8
AROPE CS345A1 GLJIVE LTRAFFIC OVICUMSUM SKYLINE VENOM
AROPE3 CSQUARE GMSTRE LUCIFER OVISLARSUM SKYLINE2 VFMUL
ARRANGE CSTREET GNY07D LUCKYNUM PAAAARTY SK_001 VFRIEND2
ARRAYSUB CSUBSEQS GNY07F LUDIC1 PAGAIN SLIKAR VFRIENDS
ARTHEVAL CTGAME GNY07H LVADER PAIRSUM SMALL VGCD
ASCDFIB CTRICK GNYR09F M00PAIR PALACE SMALLM VHUFFM
ASHMHF CTTC GOALFR M3TILE PALDR SMILEY1807 VIENTIAN
ASISTENT CUBEFR GOC11A MAIN111 PALIN SNAKYNUM VILLAGES
ASSIGN CUBERT GOC11B MAIN112 PALMKR SNGINT VISIBLEBOX
ASSIST CUBNUM GONDOR MAIN113 PARADOX SNGMSG VISION
ATMS CUTSQRS GONE MAIN12B PARITY SNGPG VLATTICE
ATOMS CVJETICI GONESORT MAIN72 PARKET1 SOCIALNE VMILI
AU7_5 CVXPOLY GOO MAIN74 PARSUMS SOCNETC VOCV
AVCHESS CWORLD GOODA MAIN75 PARTIT SOLDIER VOL
AVLVKT CYCLERUN GOODB MAIN8_C PARTPALI SOLDIERS VONNY
A_W_S_N CYLINDER GOODG MAIN8_E PARTPLNE SOLIT VOTAS
BABTWR CYLINDES GORELIAN MAKEMAZE PARTY SOLVEIT VPALIN
BABY CZ_PROB1 GOT MAKETREE PATHEADS SOPARADE VPL2_BE
BAC DAGCNT2 GPA1 MAP PATHGAME SORTBIT VZLA2019D
BACKPACK DANGER GRAFFDEF MARBLES PATULJCI SORTMAC VZLA2019E
BACKTPOL DAVIDG GRASSPLA MARIOGAM PBCGAME SORTOUT VZLA2019G
BACKUP DBALLZ GRE MARTIAN PBOARD SPA WACHOVIA
BAD DCEPC11B GREED MARYBMW PCPC12E SPCO WALKROBO
BADXOR DCEPC11I GRZZ MATCH PCPC12F SPCU WATER
BAISED DCEPC12E GSCANDY MATCHING PCPC12H SPHIWAY WEIGHT
BALIFE DCEPC12G GSHOP MATGAME PCPC12I SPIKES WEIRDFN
BALLOON DCEPC13D GSS1 MATHLOVE PERFUME SPIRALGR WIJGT
BALLOT DCEPC14A GSS2 MATNUM PERIOD SPOINTS WILLITST
BALLSUM DCEPC14F GSS3 MATSUM PERIODNI SPP WINDVANE
BALNUM DCEPC14H GSS4 MAUMAU PERMPATT SPRING WIRELESS
BANDW DCEPC206 GSS5 MAXLN PERMUT1 SQDANCE WORDCNT2
BAPPP DCEPC501 GSS6 MAXMATCH PERMUT2 SQFREE WORDEQ
BAT1 DCEPC505 GSS7 MAXOR PETYABRO SQRBR WORDRING
BAT2 DCEPC702 GSS8 MAXSUMSQ PFDEP SQRMINSUM WORDS1
BAT3 DCEPC705 GSWORDS MAXWOODS PGCD SQRROOT WOWSUBSTR2
BAT4 DCEPC706 GUANGGUN MAXXOR PHIDIAS SRTMACH WPC4F
BC DCEPC807 GUESSNM2 MAX_NUM PHONELST SSHUFFLE WPC5E
BDOI16A DCEPC810 HABLU MAY99_3 PHRASES SSORT WPC5G
BDOI16B DCEPCA03 HACKING MB1 PHU09K STABLEMP WPC5I
BDOI16D DCEPCA06 HACKRNDM MBINGO PIB STACK WPUZZLES
BDOI16E DCEPCA09 HALLOW MBIPALIN PIBO STAMMER WRONG
BEADS DCOWS HAMSTER1 MBRACKET PIE STAMPS WSCIPHER
BEENUMS DEADFR HANGOVER MC PIGBANK STARSBC WTK
BEHAPPY DECOY HAP01 MCAMP PIHU1 STC02 XC
BEMINE DEFKIN HAPPYTL MCHAOS PIR STC10 XMAX
BENEFACT DEPEND HAROWS MCIRGAME PISANO STEAD XMEN
BFIT DETER3 HARSHAD MCOINS PIZZALOC STJEPAN XORX
BGSHOOT DICT HASHIT MCQUERY PKPLOL STONE XXXXXXXX
BIA DICTSUB HAYBALE MCUR98 PL STONE2 XYI
BIGSEQ DIEHARD HC MDIGITS PLAYGAME STORE YAPP
BILLIARD DIFERENC HC12 MDIGITS1 PLD STPAR YODANESS
BINGO DIGITROOT HEADSHOT MDOLLS PLNDROME STRANG YOKOF
BINPRNUM DIGOKEYS HELPBOB MDST PLNDTREE STRAWB YOSEQ
BINSTIRL DINGRP HELPR2D2 MEANARR PLOVER STRCOUNT YOUTUBE
BISHOPS DINOSM HERDING MEDIAN3 PLSQUARE STREDUCE YOUWIN
BIT2 DISCRT HG MELE3 PMATRIX STREET ZAMENA
BITDIFF DISJPATH HIGH MENU POCRI STRLCP ZCR
BITMAP DISPUTES HIGHWAYS METEORS PODUZECE STRMATCH ZEBRA
BITPLAY DISQUERY HIKE MEXICAN POKER STRSEQ ZIGZAG2
BLACKOUT DISTANCE HIPPO MFISH POLEVAL SUBLEX ZING01
BLAMOEBA DISUBSTR HIST2 MGLAR10 POLICEMEN SUBMERGE ZNANSTVE
BLBONO DIV HISTOGRA MHLAR10 POLQUERY SUBS ZQUERY
BLCONE DIV15 HKNAP MICEMAZE POLYEQ SUBSEQ ZSEQ
BLINNET DIV2 HLP_RAMS MILPATR POLYMUL SUBSET ZSUM
BLKEK DIVCNT1 HMBY MINDIFF POLYNOM SUBSHARD ZUMA
BLLUCK DIVCNT2 HOLI MINDIST PON SUBSN
BLMIRANA DIVCNT3 HOMEW MINIMAX POP1 SUBST1
BLMIRINA DIVCNTK HOMO MINMOVE POP2 SUBSUMS
BLOCKS DIVFACT HONDA MINNUM POSTERIN SUBXOR
BLOCK_D DIVFACT3 HORRIBLE MINSEQ POSTERS SUB_PROB