#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#define plus 0
#define minus 1

int main() {
	char str[14];
	scanf("%s", str);
	int len = strlen(str);

	int i;
	for (i = 1; str[i] != '+' && str[i] != '-'; i++);
	int op = (str[i] == '+' ? minus : plus);

	char x_[7], y_[7]; 
	strncpy(x_, str, i);
	strncpy(y_, str + i + 1, len - i + 1);
	x_[i] = '\0';
	y_[len - i + 1] = '\0';
	int x = atoi(x_);
	int y = atoi(y_);

	int ans = (op == plus ? x + y : x - y);
	printf("%d\n", ans);
	return 0;
}