import java.util.Scanner;
public class Main {

	public static void main(String[] args) {

		Scanner scan = new Scanner(System.in);

		int n = scan.nextInt();
		String re = "";

		re = String.valueOf(n);

		System.out.println(re.contains("7")?"Yes":"No");
		scan.close();
	}

} import java.util.Scanner; Scanner java.util public class Main {

	public static void main(String[] args) {

		Scanner scan = new Scanner(System.in);

		int n = scan.nextInt();
		String re = "";

		re = String.valueOf(n);

		System.out.println(re.contains("7")?"Yes":"No");
		scan.close();
	}

} Main public static void main(String[] args) {

		Scanner scan = new Scanner(System.in);

		int n = scan.nextInt();
		String re = "";

		re = String.valueOf(n);

		System.out.println(re.contains("7")?"Yes":"No");
		scan.close();
	} main {

		Scanner scan = new Scanner(System.in);

		int n = scan.nextInt();
		String re = "";

		re = String.valueOf(n);

		System.out.println(re.contains("7")?"Yes":"No");
		scan.close();
	} Scanner scan = new Scanner(System.in); scan new Scanner(System.in) int n = scan.nextInt(); n scan.nextInt() scan.nextInt scan String re = ""; re "" re = String.valueOf(n) re String.valueOf(n) String.valueOf String n System.out.println(re.contains("7")?"Yes":"No") System.out.println System.out System System.out re.contains("7")?"Yes":"No" re.contains("7") re.contains re "7" "Yes" "No" scan.close() scan.close scan String[] args args public class Main {

	public static void main(String[] args) {

		Scanner scan = new Scanner(System.in);

		int n = scan.nextInt();
		String re = "";

		re = String.valueOf(n);

		System.out.println(re.contains("7")?"Yes":"No");
		scan.close();
	}

} public class Main {

	public static void main(String[] args) {

		Scanner scan = new Scanner(System.in);

		int n = scan.nextInt();
		String re = "";

		re = String.valueOf(n);

		System.out.println(re.contains("7")?"Yes":"No");
		scan.close();
	}

} Main
import java.util.Scanner;
public class Main {

	public static void main(String[] args) {

		Scanner scan = new Scanner(System.in);

		int n = scan.nextInt();
		String re = "";

		re = String.valueOf(n);

		System.out.println(re.contains("7")?"Yes":"No");
		scan.close();
	}

}
