#include <bits/stdc++.h>
using namespace std;
int main() {
int jumlah;
cin >> jumlah;
vector<int> data(jumlah);
for (int a = 2; a < jumlah; a ++) {
cin >> data[a];
}
for (int a = 2; a < jumlah; a ++) {
cout << data[a];
}
}
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