#include <iostream>
#include <string>
using namespace std;
int main() {
cout << "Enter da string" << endl;
string s;
getline(cin, s);
int i;
for (i = 2; i < s.length(); i++) {
if (s.at(i-1) == s.at(i)) {
s.erase(i, 1);
}
}
cout << s;
return 0;
}
I2luY2x1ZGUgPGlvc3RyZWFtPgojaW5jbHVkZSA8c3RyaW5nPgp1c2luZyBuYW1lc3BhY2Ugc3RkOwppbnQgbWFpbigpIHsKICAgIGNvdXQgPDwgIkVudGVyIGRhIHN0cmluZyIgPDwgZW5kbDsKICAgIHN0cmluZyBzOwogICAgZ2V0bGluZShjaW4sIHMpOwogICAgaW50IGk7CiAgICBmb3IgKGkgPSAyOyBpIDwgcy5sZW5ndGgoKTsgaSsrKSB7CiAgICAgICAgaWYgKHMuYXQoaS0xKSA9PSBzLmF0KGkpKSB7CiAgICAgICAgICAgICAgICBzLmVyYXNlKGksIDEpOwogICAgICAgIH0KICAgIH0KICAgIGNvdXQgPDwgczsKCiAgICByZXR1cm4gMDsKfQ==