import java.util.Scanner;//面向过程解决办法(未使用java API)
public class Main {
public static String Str(String str){
char[] StringArr = str.toCharArray();
char[] tempArr = new char[StringArr.length];
StringBuffer sb = new StringBuffer();
for(int i=StringArr.length-1;i>=0;i--){
tempArr[StringArr.length-1-i] = StringArr[i];
}
for(int i=0;i<str.length();i++){
StringArr[i] = tempArr[i];
sb.append(StringArr[i]);
}
return sb.toString();
}
public static void main(String[] arg){
Scanner sc = new Scanner(System.in);
String str = sc.next();
System.out.print(Str(str));
}
}
//面向对象解决方法,使用java API
import java.util.Scanner;
public class Main {
public static String Str(String str){
StringBuffer sb = new StringBuffer(str);
String str2 = String.valueOf(sb.reverse());
return str2;
}
public static void main(String[] arg){
Scanner sc = new Scanner(System.in);
String str = sc.next();
System.out.print(Str(str));
}
}
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