func_code_string: #include <bits/stdc++.h>   using namespace std;   const int BLOCK = 250;   const int N = 200100;   const int NB = BLOCK * N;   long long ans = 0ll;   int sm[NB + N], pf[N], n, pr[N];   string s;   int calc(int len, int kol) { return len / kol; }   int main() {     ios_base::sync_with_stdio(0);     cin.tie(0);     cin >> s;     n = ((int)s.size());     pf[0] = 0;     for (int i = 1; i <= n; i++) pf[i] = pf[i - 1] + (s[i - 1] ==  1  ? 1 : 0);     for (int k = 1; k < BLOCK; k++) {       for (int i = 0; i <= n; i++) sm[k * pf[i] - i + N] = 0;       for (int i = 0; i <= n; i++) {         int cv = k * pf[i] - i + N;         ans += sm[cv];         sm[cv]++;       }     }     pr[0] = -1;     for (int i = 1; i <= n; i++) {       pr[i] = pr[i - 1];       if (s[i - 1] ==  1 ) pr[i] = i;     }     for (int r = 1; r <= n; r++) {       int i = r;       for (int it = 1; it <= 2 * BLOCK; it++) {         int nw = pr[i];         if (nw < 0) break;         i = nw - 1;         int l = max(0, pr[i]);         int cans = calc(r - l, it) - calc(r - i - 1, it);         int mn = (r - i) / it + bool((r - i) % it > 0);         int mx = (r - l) / it;         mx = min(mx, BLOCK - 1);         cans -= max(0, mx - mn + 1);         ans += cans;       }     }     cout << ans;     return 0;   }   