import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		Scanner sc=new Scanner(System.in);
		int n=sc.nextInt();
		if(n%10==7 || n/100==7 || (n/10)%10==7) System.out.println("Yes");
		else System.out.println("No");
		sc.close();
	}
} import java.util.Scanner; Scanner java.util public class Main {
	public static void main(String[] args) {
		Scanner sc=new Scanner(System.in);
		int n=sc.nextInt();
		if(n%10==7 || n/100==7 || (n/10)%10==7) System.out.println("Yes");
		else System.out.println("No");
		sc.close();
	}
} Main public static void main(String[] args) {
		Scanner sc=new Scanner(System.in);
		int n=sc.nextInt();
		if(n%10==7 || n/100==7 || (n/10)%10==7) System.out.println("Yes");
		else System.out.println("No");
		sc.close();
	} main {
		Scanner sc=new Scanner(System.in);
		int n=sc.nextInt();
		if(n%10==7 || n/100==7 || (n/10)%10==7) System.out.println("Yes");
		else System.out.println("No");
		sc.close();
	} Scanner sc=new Scanner(System.in); sc new Scanner(System.in) int n=sc.nextInt(); n sc.nextInt() sc.nextInt sc if(n%10==7 || n/100==7 || (n/10)%10==7) System.out.println("Yes");
		else System.out.println("No"); n%10==7 || n/100==7 || (n/10)%10==7 n%10==7 || n/100==7 || (n/10)%10==7 n%10==7 n%10 n 10 7 n/100==7 n/100 n 100 7 (n/10)%10==7 (n/10)%10 (n/10) n 10 10 7 System.out.println("Yes") System.out.println System.out System System.out "Yes" System.out.println("No") System.out.println System.out System System.out "No" sc.close() sc.close sc String[] args args public class Main {
	public static void main(String[] args) {
		Scanner sc=new Scanner(System.in);
		int n=sc.nextInt();
		if(n%10==7 || n/100==7 || (n/10)%10==7) System.out.println("Yes");
		else System.out.println("No");
		sc.close();
	}
} public class Main {
	public static void main(String[] args) {
		Scanner sc=new Scanner(System.in);
		int n=sc.nextInt();
		if(n%10==7 || n/100==7 || (n/10)%10==7) System.out.println("Yes");
		else System.out.println("No");
		sc.close();
	}
} Main
import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		Scanner sc=new Scanner(System.in);
		int n=sc.nextInt();
		if(n%10==7 || n/100==7 || (n/10)%10==7) System.out.println("Yes");
		else System.out.println("No");
		sc.close();
	}
}