[CodingTest] 단어뒤집기

import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		
		Scanner sc = new Scanner(System.in);
		String str = sc.next();
		String[] strArr = str.split("");
		
		int startNum = 0;
		int lastNum = strArr.length-1;
		String tmp;
		
		if(strArr.length%2==0) {
			while(startNum<strArr.length/2){
				tmp=strArr[startNum];
				strArr[startNum]=strArr[lastNum];
				strArr[lastNum]=tmp;
				
				startNum++; lastNum--;
			
			}
		}else {
			while(startNum<strArr.length/2+1){
				tmp=strArr[startNum];
				strArr[startNum]=strArr[lastNum];
				strArr[lastNum]=tmp;
				startNum++; lastNum--;
			}
			
		}

		for(String s : strArr) {
			System.out.print(s);
			
		}
		

	}
}