#include <stdio.h>
#include <string.h>

void main(void){
	char s[100] = "a";
	scanf("%s",s);
	int i = 0;
	while(s[i] != '\0'){
		if(i != (int)strlen(s)-1){
			printf("%c",s[i]);
		}else{
			if(s[i] == '0'){
				printf("1");
			}else{
				printf("0");
			}
		}
		i++;
	}
}