Untitled

#include <iostream>

using namespace std;

typedef long long ll;

int d, cnt, a[1000001];

int main(){ // O(n^2) DEMXAU
    freopen("DEMXAU.INP","r",stdin);
    freopen("DEMXAU.OUT","w",stdout);

    string s; cin >> s; int n = s.size();

    cnt = 0;
    for(int i = 0; i < n; i++){
        d = 0;
        for(int j = i; j < n; j++){
            if(s[j] >= 48 && s[j] <= 57) d--;
            else d++;
            if(d > 0) cnt++;
        }
    }
    cout << cnt << endl;
    
    return 0;
}