codeforces - short substring

#include<bits/stdc++.h>
using namespace std;
#define ll long long
#define fast()(ios_base::sync_with_stdio(0),cin.tie(NULL));
int main()
{
    fast()
    int t;
    cin>>t;
    while(t--)
    {
        string s,sub;
        cin>>s;
        sub.push_back(s[0]);
        bool f=true;
        for(int i=1;i<s.size()-1;i++)
        {
            if(f)
            {
                sub.push_back(s[i]);
                f= false;
            }
            else f=true;

        }
        sub.push_back(s[s.size()-1]);
        cout<<sub<<endl;
    }
}