#include <bits/stdc++.h>   int main() {     int n, x_num;     x_num = 0;     std::string x;     std::cin >> n;     for (int i = 0; i < n; i++) {       std::cin >> x;       if (x.substr(0, 2) ==  --  || x.substr(1, 2) ==  -- )         x_num--;       else         x_num++;     }     std::cout << x_num;     return 0;   }   