leetcode

Author: Ashish-kumar7

125.cpp

@@ -0,0 +1,46 @@
+class Solution {
+public:
+    bool isPalindrome(string s) {
+    if(s.length()==0){
+        return true;
+    }
+    int i=0,j=s.length()-1;
+    while(i<=j){
+        if((s[i]>=48 and s[i]<=57) or (s[i]>=65 and s[i]<=90) or (s[i]>=97 and s[i]<=122)){
+            if((s[j]>=48 and s[j]<=57) or (s[j]>=65 and s[j]<=90) or (s[j]>=97 and s[j]<=122)){
+                if(s[i]>=48 and s[i]<=57){
+                    if(s[i]==s[j]){
+                        i++;
+                        j--;
+                    }else{
+                        return false;
+                    }
+                }
+                else if((s[i]>=65 and s[i]<=90) or (s[i]>=97 and s[i]<=122)){
+                    if(s[i]==s[j] or s[i]+32==s[j] or s[i]==s[j]+32){
+                        i++;
+                        j--;
+                    }
+                    else{
+                        return false;
+                    }
+                }
+                
+            
+            }
+             else{
+                j--;
+            }
+        }else{
+            i++;
+        }
+    }
+    if(i>j){
+        return true;
+    }else{
+        return false;
+    }
+
+     
+}
+};