#include <iostream>
#include <vector>
using namespace std;
 
int main() {
	vector <double> sequence, result_sequence;
	double term_of_sequence;
	while (cin >> term_of_sequence){
		sequence.push_back(term_of_sequence);
	}
	for (int i = 0; i < sequence.size() / 2; i++){
		result_sequence.push_back(sequence[i]);
		result_sequence.push_back(sequence[sequence.size() - 1 - i]);
	}
	for (int i = 0; i < result_sequence.size(); i++){
		cout << result_sequence[i] << " ";
	}
	return 0;
}

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0 1 -1 0 1 -1 97 113 -7.777 0 48 -69