import java.util.Scanner;
public class Main {

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

} 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();
		int a,b,c;
		a = n/100;
		b = n/10%10;
		c = n%100%10;
		if(a==7 || b ==7 || c == 7) {
			System.out.println("Yes");
		}
		else {
			System.out.println("No");
		}
	}

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

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

} public class Main {

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

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

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

}
