Program

#include <iostream>
using namespace std;
int main()
{
    int w=0;
    int x;
    cin>>x;
    for (int y=0;y!=x;y++)
    {
	char z[4];
	cin >> z;
	if(z[1]==43){w++;}
	else{w--;}
    }
    std::cout<<w<<endl;
    return 0;
}

x=0
for y in range(int(input())):
    if"+"in input():x+=1
    else:x-=1
print(x)

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