func_code_string: #include <bits/stdc++.h>   using namespace std;   bool f1(pair<long long, long long> x, pair<long long, long long> y) {     return x.first > y.first;   }   bool f2(pair<long long, long long> x, pair<long long, long long> y) {     return x.second > y.second;   }   bool f3(long long x, long long y) { return x > y; }   bool fa(vector<long long> x, vector<long long> y) { return x[0] < y[0]; }   long long fac(long long a) {     if (a == 1 || a == 0) {       return 1;     } else {       return (a * fac(a - 1));     }   }   int main() {     ios_base::sync_with_stdio(false);     cin.tie(NULL);     cout.tie(NULL);     string a;     cin >> a;     vector<long long> b;     if (a.size() == 1) {       cout << a;       exit(0);     }     a = a +  0 ;     for (long long i = 0; i < a.size() - 1; i++) {       if (a[i] == a[i + 1] && a[i] == a[i + 2]) {         a[i] =  0 ;       }     }     for (long long i = 0; i < a.size(); i++) {       if (a[i] !=  0 ) b.push_back(a[i]);     }     vector<long long> c;     long long check = 0;     for (long long i = 0; i < b.size() - 1; i++) {       if (b[i] == b[i + 1]) {         c.push_back(i);         check++;       }     }     if (check > 0) {       for (long long i = 0; i < c.size() - 1; i++) {         if (c[i] == c[i + 1] - 2) {           b[c[i + 1]] = 0;           i++;         }       }     }     for (long long i = 0; i < b.size(); i++) {       if (b[i] != 0) {         char g = b[i];         cout << g;       }     }     return 0;   }   