int temp , m = 10, sum, r = 10,flag=0,temp2;
char input;
String in = "";
const int ledPin = 13;

void setup() {
  Serial.begin(9600);
  Serial.setTimeout(10);
  pinMode(ledPin,OUTPUT);
}
void loop() {
  while (Serial.available()==0){}
  while (Serial.available() > 0){
    input = Serial.read();
    Serial.println("The value of n " + String(input));
    in.concat(input);
    if (isPalindrome(in.toInt())){
      digitalWrite(ledPin,HIGH);
      Serial.println("Is Palimdrome Led Is ON");
    }
    else{
      digitalWrite(ledPin,LOW);
      Serial.println("Is Palimdrome Led Is OFF");
    }
  }
}
boolean isPalindrome(int n){
  boolean FLAGG = false,flag=false;
  temp = n, m = 10, sum, r = 10, temp2 = n;
  while (temp2 <= temp && flag==false) {
      while (n >= m)
        n /= 10;
      m*=10;
      temp2 = n;
      Serial.println(String(n)+"  "+String(m));
      sum=0;
      while (n > 0) {
        r = n % 10;
        sum = (sum * 10) + r;
        n = n / 10;
      }
      if (temp2 == sum) {
        FLAGG = true;
      } else {
        FLAGG = false;
      }
      n=temp;
      if(temp2==temp) {
                flag=true;
      }
    }
    return FLAGG;
}