#include <bits/stdc++.h>
using namespace std;
using ll = long long;
#define rep(i, s, e) for (int i = (int)s; i < (int)e; ++i)
#define all(a) (a).begin(), (a).end()

int main() {
    cin.tie(nullptr);
    
    int N;
    string S;
    cin >> N >> S;
    
    rep(i, 1, N - 1) cout << S[i];
    
    cout << '\n';
}