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

void main(void){
	char score[100] = "a";
	scanf("%s",score);
	if(score[0] != 'x'){
		printf("%s",score);
	}else{
		char decision[100] = "a";
		strncpy(decision, score+1,(int)strlen(score)-1 );
		decision[(int)strlen(score)-1] = '\0';
		int scoreNum = atoi(decision);
		long long int result = 4294967296-scoreNum;
		printf("%ld",result);
	}
}