#include <iostream> //cin, cout #include <vector> //vector #include <algorithm> //sort,min,max,count #include <string> //string,getline, to_string #include <cstdlib> //abs(int) #include <utility> //swap, pair #include <deque> //deque #include <climits> //INT_MAX #include <bitset> //bitset #include <cmath> //sqrt, ceil. M_PI, pow, sin #include <ios> //fixed #include <iomanip> //setprecision #include <sstream> //stringstream using namespace std; int main() { string ans; string temp; int N; cin >> N; for (int i = 0; i < N; i++) { cin >> temp; ans = ans + temp; } cout << ans << endl; return 0; }