func_code_string: #include <bits/stdc++.h>   using namespace std;   long long min(long long x, long long y) { return (x < y) ? x : y; }   long long max(long long x, long long y) { return (x > y) ? x : y; }   const int N = 100009;   int x, y, n, m, i, u, w, z, sum, best, j, k, t, mx;   int a[N];   string s, ans;   int main() {     ios_base::sync_with_stdio(false);     cin >> s;     n = s.size();     while (i < n) {       if (s[i] ==  d  && s[i + 1] ==  o  && s[i + 2] ==  t  && i != 0 &&           i != n - 3) {         ans.push_back( . );         i += 2;       } else if (s[i] ==  a  && s[i + 1] ==  t  && !x && i != 0 && i != n - 2) {         x = 1;         i++;         ans.push_back( @ );       } else         ans.push_back(s[i]);       i++;     }     cout << ans;     return 0;   }   