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Looks inefficient to me. #3

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Looks inefficient to me. #3

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4 changes: 2 additions & 2 deletions LongestSubstringWithMUniqueCharacters.java
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Original file line number Diff line number Diff line change
Expand Up @@ -56,7 +56,7 @@ public static String solution(String s, Integer m) throws Exception
}
end++;
//move start forward if number of unique characters is greater than m
while(!isLessThanM(hash,m))
while(!isLessThanM(hash,m)) // O(N) time in worst case when m = n.
{
int temp = hash.get((int)s.charAt(start));
hash.put((int)s.charAt(start),--temp);
Expand All @@ -73,7 +73,7 @@ public static String solution(String s, Integer m) throws Exception

}

public static boolean isLessThanM(HashMap<Integer,Integer> hash, Integer m)
public static boolean isLessThanM(HashMap<Integer,Integer> hash, Integer m) // O(HashMap size) runtime.
{
int count =0;
for(Integer key:hash.keySet())
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