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- class Solution {
- public:
- bool isPalindrome(string s) {
- for(int i = 0, j = s.size() - 1; i < j; i++, j--){
- while(!isalpha(s[i]) && !isdigit(s[i]) && i < j) i++;
- while(!isalpha(s[j]) && !isdigit(s[j]) && i < j) j--;
- if(tolower(s[i]) != tolower(s[j])) return false;
- }
- return true;
- }
- };
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