#include <bits/stdc++.h>
using namespace std;
int main() {
string S;
int p=1, m=0;
cin >> S;
for(int i=0; i<S.size(); i++){
if(S.at(i)=='+'){
p++;
}else if(S.at(i)=='-'){
m++;
}
}
cout << p - m;
}
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