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

int main(void) {
	char buf[7], s[14], b;
	int i, j, op, x, y;
	scanf("%s", s);
	for(i = 1; s[i] != '+' && s[i] != '-'; i++);
	for(j = 0; i > j; j++){
		buf[j] = s[j];
	}
	buf[j] = '\0';
	x = atoi(buf);
	op = s[i];
	for(j = 0; j + i+1 < strlen(s); j++){
		buf[j] = s[j+i+1];
	}
	buf[j] = '\0';
	y = atoi(buf);
	printf("%d\n",op == '+' ? x - y : x + y);
	return 0;
}