#include <bits/stdc++.h>   using namespace std;   inline void checkMAX(int& a, int b) {     if (a < b) a = b;   }   inline void checkMIN(int& a, int b) {     if (a > b) a = b;   }   int main() {     char s[333] = {};     cin >> s;     int mn = 0, mx = 0, curr = 0;     for (int i = 0; s[i]; i++) {       if (s[i] ==  + )         curr++;       else         curr--;       checkMIN(mn, curr);       checkMAX(mx, curr);     }     cout << (mx - mn) << endl;     return 0;   }   