func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     long long int i, j, k, n, c = 0, p = 0, al, bl, l = 0;     string s;     cin >> s;     for (i = 0; i < s.length(); i++) {       l++;       c += (s[i] -  0 );       if (c % 3 == 0 || (s[i] -  0 ) % 3 == 0 || l >= 3) {         p++;         c = 0;         l = 0;       }     }     if (s[0] ==  0 ) p--;     cout << p;   }   