282A/main.cpp


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#include <iostream>
#include <string>

using namespace std;

int main(){
       string a; 
       getline(cin, a); 
       int b = stoi(a);
       int c = 0;
       for(int i = 0; i < b; i++){
               getline(cin, a, '\n');
               if(a.compare("X++") == 0){
                       c++;
               } else if (a.compare("++X") == 0){
                       ++c;
               } else if (a.compare("--X") == 0){
                       --c; 
               } else {
                       c--;
               }
       }
       cout<<c;
       return 0;
}