#include <algorithm>
#include <cmath>
#include <cstdio>
#include <cstdlib>
#include <functional>
#include <iomanip>
#include <iostream>
#include <iterator>
#include <limits>
#include <list>
#include <map>
#include <numeric>
#include <queue>
#include <set>
#include <sstream>
#include <stack>
#include <string>
#include <utility>
#include <valarray>
#include <vector>

#define MOD 1000000007
#define pe(str) return cout<<(str)<<endl,0
#define px(str) {cout<<(str)<<endl;exit(0);}
#define pr(str) cout<<(str)<<endl
#define prpr(str) cout<<str<<endl
#define db(str) cerr<<(str)<<endl
#define dbdb(str) cerr<<str<<endl
#define re(i,n) for(int i=0;i<(n);i++)
#define rep(i,a,b) for(int i=(a);i<(b);i++)
#define bw(a,b,c) (((a)<=(b))&&((b)<=(c)))
#define spr(a) setprecision(a)
using namespace std;

typedef long long ll;
typedef unsigned long long ull;
typedef long double ld;
typedef pair<int,int> pii;

template<class InputIterator>
void dump(InputIterator first,InputIterator last,char delim=' '){
	for(InputIterator it=first;it!=last;it++){
		if(it!=first)cout<<delim;
		cout<<*it;
	}
}

int main(void){
	string s;
	string a,b;
	int op;
	cin>>s;
	rep(i,1,s.size()){
		if(s[i]=='+'){
			op=0;
			a=s.substr(0,i);
			b=s.substr(i+1);
			break;
		}
		else if(s[i]=='-'){
			op=1;
			a=s.substr(0,i);
			b=s.substr(i+1);
			break;
		}
	}
	if(op)cout<<stoi(a)+stoi(b)<<endl;
	else cout<<stoi(a)-stoi(b)<<endl;

	return 0;
}