My solution doesn't work when I click submit since it fails some cases, however when I run those very same test cases, under custom test case it works. Could someone help me figure out why?

Here is my solution

class Solution:

storage = set()
def wordBreak(self, s: str, wordDict: List[str]) -> bool:
    
    if not s or s in self.storage:
        return True
    
    for word in wordDict:
        if word in s:
            lst = s.split(word, 1)
            if self.wordBreak(lst[0], wordDict) and self.wordBreak(lst[1], wordDict):
                self.storage.add(s)
                return True
    
    return False
    

Here is the test case

"a" ["b"]

Here is a picture of it not working in submit but working under custom test cases.

CodePudding user response：

I had a similar problem. The issue with my code was that I had initialized list outside of the function, so it was updated every time function was called, whereas I wanted it to be empty every time function is called. So I emptied at the end of function.

If you could give the problem statement, it would be easier to figure what the actual problem is.

CodePudding user response：

It fails on those test cases because storage will not be reset to an empty set between consecutive runs of tests, and so it will have false information about a next test case.

However, even if you would manage that storage such that it would be reset on every test, you would bump into a time out message on the more complex test cases. So you'll need a more efficient algorithm.

To make sure your code works, I would suggest to pay attention to the following test cases:

"fohhemkkaecojceoaejkkoedkofhmohkcjmkggcmnami"
["kfomka","hecagbngambii","anobmnikj","c","nnkmfelneemfgcl","ah","bgomgohl","lcbjbg","ebjfoiddndih","hjknoamjbfhckb","eioldlijmmla","nbekmcnakif","fgahmihodolmhbi","gnjfe","hk","b","jbfgm","ecojceoaejkkoed","cemodhmbcmgl","j","gdcnjj","kolaijoicbc","liibjjcini","lmbenj","eklingemgdjncaa","m","hkh","fblb","fk","nnfkfanaga","eldjml","iejn","gbmjfdooeeko","jafogijka","ngnfggojmhclkjd","bfagnfclg","imkeobcdidiifbm","ogeo","gicjog","cjnibenelm","ogoloc","edciifkaff","kbeeg","nebn","jdd","aeojhclmdn","dilbhl","dkk","bgmck","ohgkefkadonafg","labem","fheoglj","gkcanacfjfhogjc","eglkcddd","lelelihakeh","hhjijfiodfi","enehbibnhfjd","gkm","ggj","ag","hhhjogk","lllicdhihn","goakjjnk","lhbn","fhheedadamlnedh","bin","cl","ggjljjjf","fdcdaobhlhgj","nijlf","i","gaemagobjfc","dg","g","jhlelodgeekj","hcimohlni","fdoiohikhacgb","k","doiaigclm","bdfaoncbhfkdbjd","f","jaikbciac","cjgadmfoodmba","molokllh","gfkngeebnggo","lahd","n","ehfngoc","lejfcee","kofhmoh","cgda","de","kljnicikjeh","edomdbibhif","jehdkgmmofihdi","hifcjkloebel","gcghgbemjege","kobhhefbbb","aaikgaolhllhlm","akg","kmmikgkhnn","dnamfhaf","mjhj","ifadcgmgjaa","acnjehgkflgkd","bjj","maihjn","ojakklhl","ign","jhd","kndkhbebgh","amljjfeahcdlfdg","fnboolobch","gcclgcoaojc","kfokbbkllmcd","fec","dljma","noa","cfjie","fohhemkka","bfaldajf","nbk","kmbnjoalnhki","ccieabbnlhbjmj","nmacelialookal","hdlefnbmgklo","bfbblofk","doohocnadd","klmed","e","hkkcmbljlojkghm","jjiadlgf","ogadjhambjikce","bglghjndlk","gackokkbhj","oofohdogb","leiolllnjj","edekdnibja","gjhglilocif","ccfnfjalchc","gl","ihee","cfgccdmecem","mdmcdgjelhgk","laboglchdhbk","ajmiim","cebhalkngloae","hgohednmkahdi","ddiecjnkmgbbei","ajaengmcdlbk","kgg","ndchkjdn","heklaamafiomea","ehg","imelcifnhkae","hcgadilb","elndjcodnhcc","nkjd","gjnfkogkjeobo","eolega","lm","jddfkfbbbhia","cddmfeckheeo","bfnmaalmjdb","fbcg","ko","mojfj","kk","bbljjnnikdhg","l","calbc","mkekn","ejlhdk","hkebdiebecf","emhelbbda","mlba","ckjmih","odfacclfl","lgfjjbgookmnoe","begnkogf","gakojeblk","bfflcmdko","cfdclljcg","ho","fo","acmi","oemknmffgcio","mlkhk","kfhkndmdojhidg","ckfcibmnikn","dgoecamdliaeeoa","ocealkbbec","kbmmihb","ncikad","hi","nccjbnldneijc","hgiccigeehmdl","dlfmjhmioa","kmff","gfhkd","okiamg","ekdbamm","fc","neg","cfmo","ccgahikbbl","khhoc","elbg","cbghbacjbfm","jkagbmfgemjfg","ijceidhhajmja","imibemhdg","ja","idkfd","ndogdkjjkf","fhic","ooajkki","fdnjhh","ba","jdlnidngkfffbmi","jddjfnnjoidcnm","kghljjikbacd","idllbbn","d","mgkajbnjedeiee","fbllleanknmoomb","lom","kofjmmjm","mcdlbglonin","gcnboanh","fggii","fdkbmic","bbiln","cdjcjhonjgiagkb","kooenbeoongcle","cecnlfbaanckdkj","fejlmog","fanekdneoaammb","maojbcegdamn","bcmanmjdeabdo","amloj","adgoej","jh","fhf","cogdljlgek","o","joeiajlioggj","oncal","lbgg","elainnbffk","hbdi","femcanllndoh","ke","hmib","nagfahhljh","ibifdlfeechcbal","knec","oegfcghlgalcnno","abiefmjldmln","mlfglgni","jkofhjeb","ifjbneblfldjel","nahhcimkjhjgb","cdgkbn","nnklfbeecgedie","gmllmjbodhgllc","hogollongjo","fmoinacebll","fkngbganmh","jgdblmhlmfij","fkkdjknahamcfb","aieakdokibj","hddlcdiailhd","iajhmg","jenocgo","embdib","dghbmljjogka","bahcggjgmlf","fb","jldkcfom","mfi","kdkke","odhbl","jin","kcjmkggcmnami","kofig","bid","ohnohi","fcbojdgoaoa","dj","ifkbmbod","dhdedohlghk","nmkeakohicfdjf","ahbifnnoaldgbj","egldeibiinoac","iehfhjjjmil","bmeimi","ombngooicknel","lfdkngobmik","ifjcjkfnmgjcnmi","fmf","aoeaa","an","ffgddcjblehhggo","hijfdcchdilcl","hacbaamkhblnkk","najefebghcbkjfl","hcnnlogjfmmjcma","njgcogemlnohl","ihejh","ej","ofn","ggcklj","omah","hg","obk","giig","cklna","lihaiollfnem","ionlnlhjckf","cfdlijnmgjoebl","dloehimen","acggkacahfhkdne","iecd","gn","odgbnalk","ahfhcd","dghlag","bchfe","dldblmnbifnmlo","cffhbijal","dbddifnojfibha","mhh","cjjol","fed","bhcnf","ciiibbedklnnk","ikniooicmm","ejf","ammeennkcdgbjco","jmhmd","cek","bjbhcmda","kfjmhbf","chjmmnea","ifccifn","naedmco","iohchafbega","kjejfhbco","anlhhhhg"]

And:

"aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaab"
["a","aa","aaa","aaaa","aaaaa","aaaaaa","aaaaaaa","aaaaaaaa","aaaaaaaaa","aaaaaaaaaa"]

I'll leave a hint for finding a better algorithm:

memoization (dynamic programming)