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Coding Problem (Strings)
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static int getMaxStrLen(String s) { | |
Set<Character> chars = new HashSet<> (); | |
char[] cArray = s.toCharArray(); | |
for (char c : cArray) { | |
if (!chars.contains(c)) { | |
chars.add(c); | |
} | |
} | |
if (chars.size() < 2) | |
return 0; | |
Character[] chrArray = chars.toArray(new Character[0]); | |
StringBuilder sb = new StringBuilder(); | |
int maxLength = 0; | |
for (int i=0; i<chrArray.length; i++) { | |
for (int j = 1; j<chrArray.length; j++) { | |
for (char c : cArray) { | |
if (c == chrArray[i] || c == chrArray[j]) | |
sb.append(c); | |
} | |
String s2 = sb.toString(); | |
if (isValidString(s2)) { | |
if (s2.length() > maxLength) | |
maxLength = s2.length(); | |
} | |
sb.setLength(0); | |
} | |
} | |
return maxLength; | |
} | |
static boolean isValidString(String s) { | |
if (s.length() < 2) | |
return false; | |
for (int i = 0; i < s.length() - 1; i++) { | |
if (s.charAt(i) == s.charAt(i + 1)) | |
return false; | |
} | |
return true; | |
} | |
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