Codeforces Ultra-Fast Mathematician

题目链接：http://codeforces.com/problemset/problem/61/A

import java.util.Scanner;

public class UltraFastMathematician {

public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);
String string = scanner.next();
String string2 = scanner.next();
StringBuilder stringBuilder = new StringBuilder();
for(int i = 0; i < string.length(); i++) {
if(string.charAt(i) == string2.charAt(i)) {
stringBuilder.append(0);
} else {
stringBuilder.append(1);
}
}
System.out.println(stringBuilder.toString());
}
}