[BOJ] 11655 ROT13 (JAVA)

https://www.acmicpc.net/problem/11655

11655번: ROT13

import java.io.BufferedReader;
import java.io.InputStreamReader;

public class Main {
    
    public static void main(String[] args) throws Exception {

        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        StringBuilder sb = new StringBuilder();
        String str = br.readLine();
        for (int i = 0; i < str.length(); i++) {
            char c = str.charAt(i);
            if (65 <= c && c <= 90) {
                c = 90 < c + 13 ? (char) (c - 13) :(char) (c + 13);
            } else if (97 <= c && c <= 122) {
                c = 122 < c + 13 ? (char) (c - 13) :(char) (c + 13);
            }
            sb.append(c);
        }
        System.out.print(sb.toString());

    }

}