#include <iostream>
#include <string>
using namespace std;


int main(){
    string s; cin >> s;
    int i=0;
    int sign1 = 1;
    if(s[i] == '-' || s[i]== '+'){
        if(s[i] == '-') sign1 = -1;
        else sign1 = 1;
        i++;
    }
    int tmp1 = 0;
    while('0' <= s[i] and s[i] <= '9'){
        tmp1 *= 10;
        tmp1 += s[i++] - '0';
    }
    tmp1 *= sign1;

    char op = s[i++];

    int sign2 = 1;
    if(s[i] == '-' || s[i] == '+'){
        if(s[i] == '-') sign2 = -1;
        else sign2 = 1;
        i++;
    }

    int tmp2 = 0;
    while('0'<= s[i] and s[i] <= '9'){
        tmp2 *= 10;
        tmp2 += s[i++] - '0';
    }
    tmp2 *= sign2;


    if(op == '+'){
        cout << tmp1 - tmp2 << endl;
    }else{
        cout << tmp1 + tmp2 << endl;
    }
}