1 class Solution { 2 public: 3 bool isPalindrome(string s) { 4 int strLen = s.size(); 5 int pos_h = 0; 6 int pos_t = 0; 7 char *copy = new char[strLen]; 8 int num = 0; 9 for(int i=0;i= 65 && s[i] <= 90 || s[i] >= 48 && s[i] <= 57)12 {13 *(copy+num) = s[i];14 num++;15 }16 else if(s[i] >= 97 && s[i] <= 122)17 {18 *(copy+num) = s[i] - 32;19 num++;20 }21 }22 if(num == 0 || num == 1)23 return true;24 pos_h = 0;25 pos_t = num - 1;26 for(int i=0;i