#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <algorithm>
#include <iostream>
#include <map>
#include <vector>
#include <queue>
#include <set>

using namespace std;

//namaega184

int main(){
	char s[21];scanf("%s",s);
	int len=strlen(s);char *op;
	for(int i=1;i<len;i++)if(s[i]=='+'||s[i]=='-'){op=&s[i];break;}
	int a=atoi(s),b=atoi(op+1);
	if(*op=='+')printf("%d\n",a-b);else printf("%d\n",a+b);
	 
	return 0;
}