# Test case 26

• Main idea is to seek local minimum and remove the numbers before it (at left side of local minimum). My code passed 25/27 test cases.

In the following case, my code provides an 8897 digit answer, which is different from an 8899 digit answer from OJ. Could anyone tell me what's wrong in my code?

It would be greatly appreaciated.

``````class Solution(object):
def removeKdigits(self, num, k):
# get the smallest leading number
if k == 0: return num
if k == len(num): return "0"

for i in xrange(k+1):
if minhead == 0:         # go deal with numbers to be removed
break

if k+1 == len(num):          # just leave the smallest
elif headpos == 0:           # a corner case
return num[0] + self.removeKdigits(num[1:], k)
else:                        # keep seeking
``````

Test case:

"9964143637881536115347130215819342018286368478941148499497648482711459533461004254405644237053081606083361703097681313409879305615510320200854934444651935440830730707105506511273844202022847156939479617415032308016122590196433883734152425324321850950025461922368309179936567772058238956815658522566619712309337787110000248140248621983725541138216249932119341652497227527347196915584874245747655643373728114771002178121013476532176128561227651191732455258556988215663509467036265356759614472865379500702323093381756610448863769645016608790510082369942579876359844432606935705284237991853585529691576005445931743352187877817181108107659316666309094802979311362685246271238811648377471342618391148123088439359424933182816550379826963424443077369303388270800024963285014879985932202469314657763554311465766241899886051752598919297325070163176559846505309761680481734434389501672456194786083611750491579701118513267425527823659774604213876847372305982594830156571943761073290766254549904295349986681374115730100337100520099231426507753102943794893125561715341714882235592831859851753324171964100271220487416100160426921656692822076747471313551671799749136336020476415426498900467136354109743348482211848364210754765858145061682176996476703252113885157082272913476246001426543322720172472400433849455239728009056816478610972157143620619838281484903385698733878747333577266693321881082248284899461049170566515551638479945941859455913682794110638768950164185110174329858257546630386490667378849662828892086742219395018081013139661291385111259380764915297206827929993411346366971457561364592936565292180883672568239002607555932099570488014976458337969750530347455002905982811683646920337042844933044228156313556893574266924334421860399441795570348505986213235968877629037821039295531078587452820520378855971549385240599138029027426814355797039844185115797752068944043026514402978978851104279587917456738135851069474951293893468797930509914957546422062980494255056416478680885689780986382412165954803439553973540706927945767861390922237184889229475493329909116465687108626908432452951254474743412354718972999375833762203809869944881570164493465129271906768322772743880895596954354231919788356736973386736425035313669786510718228292965591836221183232782757135478753561150173194385615500385373233981959493952471916956111069857167656232936080328221546753405850472812773151559894114363782701095557909245140582135212670655043831517604969231621049089970261307870253571673590180617152285302103559731670339047857148567799820792277393882937146083861121444641752891357528477673783704643969540852343441491634297968882019783645863769499154099829169034519420545243923982738295303981036771224459015594039438755491178665247811195429718554410638417459245168087508373787473581006876786621492463488551382880888016193098727660257087286075211981304241455039635843389359277754175667320688287674673170776696626809610432006193791350589302883359213754039606437515551397976472818092708306048112752211824002614062564731378390107393841924024992900096272203427395268363591954016973222085497810130812644667188518603229549084506011656716594567797567298132136216194941840585237878858460280261239887687428829375605555945753827119720586750631367716075599073634731471504260724387869378014436808380008096784296619353982377042796709113277023048503614322336338787624495889957753806917512300465195258871128700879115968204258194381296288237529334846252325708114045756734861206974694332984226429182357067126837458065169631111462435830423526194589462766826719275660644126448562809748092006285700764039691021497055662341656594078963665734973515004383619424206199423404426260428435029625839720828715873547773951561589009316755538926217057660908236519924235235619770675436108507917722314466270142484807060731907806830319044273720218636481802179286069057173343243951397675980777851315120680118430072968591076578558637383169959517835261015038328382345688129364776302241168625264064812069025112090263137082552535421329754943044198941936240688824218041364039700546228900283717808668314344125472252807531518791099498692946306328235067764410531248477081885126875518308672990452448890110228731016986585572535897645362817103841400441546963512425504489024589005011590124360348938492006792308704507061642951011458749395538490335711130206859554892150422217109609854841320808883156074499689978384411831818569414262079698400452210643442851321588188354275888886257603641542109776241390729041700493644160923820461710058687648706149758610663198374013955557327262668118696927211331534855305270845371631301081119472690423140645543286568447703696095356440639011578632338858560471650438477891281241072990894958114372212031895484984653567691286852652650107819350239352406247153415410489981573464865003560861111332722204086414609128602020530497009851004558213098998166539307648066090774246910719321947561845561811551635349521128959781556450619336828717871420898920647009920722717177061958022742777205857695854934254785056637106031433088913246626097291550078584270096661510394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71"
1000

• I'm not in the mood to check the code (sorry), but I checked the output to verify that it's indeed you, not the judge, who is wrong. I prepended zeros to your output so that it has k fewer digits than the input and then checked whether it's a subsequence of the input (the recent Is Subsequence problem came in handy :-). It's not, so your output is indeed wrong.

• @StefanPochmann Thanks a lot : ) I like the prepend idea!

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