#include <iostream>
using namespace std;
 
int main() {
	// your code goes here
	return 0;
}

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#include <iostream>
using namespace std;

int main()
{
	cout << 15 << endl;         	// 数字の出力
	cout << oct << 15 << endl;
	cout << hex << 15 << endl;
	cout << dec << 15 << endl;

	cout << 0b1111 << endl;
	cout << 017 << endl;
	cout << 0xf << endl;

	cout << 10 + 5  << endl;
	cout << 5 * 3  << endl;

	system("pause");
	return 0;  
}