[코테7] 회문문자열

✔ 나의 답-> 성공

import java.util.*;

public class Main {

 public static String solution(String input){
   input = input.toUpperCase();
   String output ="";
   for(int i = input.length()-1; i>=0;i--){
     output+=String.valueOf(input.charAt(i));
    }
   if(output.equals(input))
   return "YES";
   else
   return "NO";
  }


  public static void main(String[] args){
    Scanner kb = new Scanner(System.in);
    String input = kb.next();
    System.out.println(solution(input));
  }


}

✔️ 강의 답
1)

import java.util.*;

public class p7 {
   public static String solution(String str) {
	   str=str.toUpperCase();
	   String answer="YES";
	   int len = str.length();
	   for(int i=0;i<len/2;i++) {
		   if(str.charAt(i)!=str.charAt(len-1-i)) return "NO";
	     }	   
	    return answer;	   
	   }
   public static void main(String[] args) {
	   Scanner kb = new Scanner(System.in);
	   String str = kb.next();
	   System.out.println(solution(str));
	   
      }   	
}

2)

import java.util.*;

public class p7 {
   public static String solution(String str) {
	   String answer="NO";
       String tmp = new StringBuilder(str).reverse().toString();
       if(str.equalsIgnoreCaser(tmp)) answer="YES";
       return answer
	   }
   public static void main(String[] args) {
	   Scanner kb = new Scanner(System.in);
	   String str = kb.next();
	   System.out.println(solution(str));
	   
      }   	
}