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| class Solution {
public int maximumLength(String s) {
List<Integer>[] groups = new ArrayList[26];
for (int i = 0; i < 26; i++) {
groups[i] = new ArrayList<>();
}
int length = 0;
for (int i = 0; i < s.length(); i++) {
length++;
if (i + 1 == s.length() || s.charAt(i) != s.charAt(i + 1)) {
groups[s.charAt(i) - 'a'].add(length);
length = 0;
}
}
int ans = 0;
for (List<Integer> lengthList : groups) {
if (lengthList.isEmpty()) {
continue;
}
lengthList.sort(Collections.reverseOrder());
lengthList.add(0);
lengthList.add(0);
ans = Math.max(ans, Math.max(lengthList.get(0) - 2, Math.max(Math.min(lengthList.get(0) - 1, lengthList.get(1)), lengthList.get(2))));
}
return ans > 0 ? ans : -1;
}
}
|
References
2981. Find Longest Special Substring That Occurs Thrice I