#include <bits/stdc++.h>
using namespace std;

int main() {
    string a, b, formula;
    cin >> a >> b;
    formula = a + b + '+';
    __int128_t ans = 0, cache = 0, sign = 1;
    for (char c : formula) {
        if (c == '+') {
            ans += sign * cache;
            cache = 0;
            sign = 1;
        } else if (c == '-') {
            ans += sign * cache;
            cache = 0;
            sign = -1;
        } else {
            cache = 10 * cache + c - '0';
        }
    }
    if (ans < 0) {
        cout << '-';
        ans = -ans;
    } else if (ans == 0) {
        cout << 0 << endl;
        return 0;
    }
    string output;
    __int128_t ans_copy = ans;
    while (ans_copy) {
        output.push_back(ans_copy % 10 + '0');
        ans_copy /= 10;
    }
    reverse(output.begin(), output.end());
    cout << output << endl;
}