func_code_string: #include <bits/stdc++.h>   using namespace std;   int MAX = 1000000;   int MIN = -1000000;   int INF = 1000000000;   int x4[4] = {0, 1, 0, -1};   int y4[4] = {1, 0, -1, 0};   int x8[8] = {0, 1, 1, 1, 0, -1, -1, -1};   int y8[8] = {1, 1, 0, -1, -1, -1, 0, 1};   int i, j, k;   int main() {     string str;     cin >> str;     str.push_back( 0 );     reverse(str.begin(), str.end());     str.push_back( 0 );     int indx = 1, ans = 1;     while (indx < str.size()) {       if (str[indx] ==  1  && str[indx + 1] ==  1 ) {         str[indx - 1] =  1 ;         for (i = indx; str[i] ==  1 ; i++) str[i] =  0 ;         str[i] =  1 ;         indx = i;       } else         indx++;     }     int satu = 0;     for (i = (0); i < (str.size()); i++) satu += (str[i] ==  1 );     cout << satu << endl;     {       fflush(stdin);       getchar();     };     return 0;   }   