#include <stdio.h>
int main() {
	int x,y,z,c;
	/* input */
	printf("x=");
	scanf("%d",&x);
	printf("y=");
	scanf("%d",&y);

	/* calculation */
	c=0;
	z=0;
	do{
		z=x^y;
		c=x&y;

		x=z;
		y=c<<1;
	}while(c);

	/* output */
	printf("x+y = %d\n",z);
}