bit++ codeforces in c++

#include <iostream>
#include <string>

int main() {
    int n;
    std::cin >> n;

    int x = 0;
    for (int i = 0; i < n; ++i) {
        std::string operation;
        std::cin >> operation;

        if (operation == "X++" || operation == "++X") {
            ++x;
        } else if (operation == "X--" || operation == "--X") {
            --x;
        }
    }

    std::cout << x << std::endl;

    return 0;
}