public class Main {
	public static void main(String[] args) {
		int n = 0;
		int m = 0;
		int q = 0;
		int a = 0;
		int c = 0;
		int d = 0;
		for(int i = 8; ; i++) {
			n = i % 8;
			m = i / 8  % 8;
			q = i / 8 / 8  % 8;
			a = i / 8 / 8 / 8;
			c = i % 17;
			d = i / 17  % 17;
			if(n == 1 & m == 1 & q == 7 & c == 4 & d == 15 & i / 17 / 17 == 2*a) {
				
				System.out.println(i);
				break;
			}
		}
	}
}
/**************************************************************
	Problem: 1263
	User: admin
	Language: Java
	Result: Runtime Error
****************************************************************/