func_code_string: #include <bits/stdc++.h>   using namespace std;   template <class T>   inline bool uin(T& a, T b) {     return a > b ? (a = b, true) : false;   }   template <class T>   inline bool uax(T& a, T b) {     return a < b ? (a = b, true) : false;   }   int main() {     ios::sync_with_stdio(false);     cin.tie(0);     string s;     cin >> s;     for (int i = (int)s.length() - 1, cnt = 0; i >= 0; --i) {       if (s[i] ==  0 )         ++cnt;       else if (cnt)         --cnt;       else         s[i] =  0 ;     }     cout << s <<   n ;   }   