#include <bits/stdc++.h>

typedef long long ll;

using namespace std;

int main(){

    string s;
    cin >> s;

    ll ans = 0;

    if(s[0] == s[s.length() - 1] && s[0] == '+') ans++;

    for(ll i = 1; i < s.length(); i++){
        if(s[i] == s[i - 1] && s[i] == '+') ans++;
    }
    cout << ans << endl;

    return 0;
}