func_code_string: #include <bits/stdc++.h>   const int inf = 1e7 + 7;   long long mod = 1e9 + 7;   const double eps = 1e-9;   using namespace std;   int num[1000005];   char s[1000005];   int main() {     cin >> s;     int len = strlen(s);     num[len] = 0;     for (int i = len - 1; i >= 0; i--) {       if (s[i] ==  0 )         num[i] = num[i + 1] - 1;       else {         num[i] = num[i + 1] + 1;         if (num[i] > 0) {           num[i] = 0;           s[i] =  0 ;         }       }     }     cout << s << endl;     return 0;   }   