#include <iostream>
using namespace std;
int main()
{
int i,n,x=0;
string str;
cin>>n;
for(i=0;i<n;i++)
{cin>> str;
for(i=0;i<n;i++)
{if(str[i]=='+')
{x=x+1;
break;}
/*else if(str[i]=='-')
{x=x-1;
break;*/}
}
cout<< x;
return 0;
}
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