import java.util.*;

public class Main {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		
		int n = sc.nextInt();
		String a = String.valueOf(n);
		
		char[] s = a.toCharArray();
		
		if(s[0] == '7'||s[1] == '7'||s[2] == '7') {
			System.out.println("Yes");
		}else {
			System.out.println("No");
		}
		
		
		}	
 	}
 import java.util.*; util.* java public class Main {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		
		int n = sc.nextInt();
		String a = String.valueOf(n);
		
		char[] s = a.toCharArray();
		
		if(s[0] == '7'||s[1] == '7'||s[2] == '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();
		String a = String.valueOf(n);
		
		char[] s = a.toCharArray();
		
		if(s[0] == '7'||s[1] == '7'||s[2] == '7') {
			System.out.println("Yes");
		}else {
			System.out.println("No");
		}
		
		
		} main {
		Scanner sc = new Scanner(System.in);
		
		int n = sc.nextInt();
		String a = String.valueOf(n);
		
		char[] s = a.toCharArray();
		
		if(s[0] == '7'||s[1] == '7'||s[2] == '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 String a = String.valueOf(n); a String.valueOf(n) String.valueOf String n char[] s = a.toCharArray(); s a.toCharArray() a.toCharArray a if(s[0] == '7'||s[1] == '7'||s[2] == '7') {
			System.out.println("Yes");
		}else {
			System.out.println("No");
		} s[0] == '7'||s[1] == '7'||s[2] == '7' s[0] == '7'||s[1] == '7'||s[2] == '7' s[0] == '7' s[0] s 0 '7' s[1] == '7' s[1] s 1 '7' s[2] == '7' s[2] s 2 '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();
		String a = String.valueOf(n);
		
		char[] s = a.toCharArray();
		
		if(s[0] == '7'||s[1] == '7'||s[2] == '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();
		String a = String.valueOf(n);
		
		char[] s = a.toCharArray();
		
		if(s[0] == '7'||s[1] == '7'||s[2] == '7') {
			System.out.println("Yes");
		}else {
			System.out.println("No");
		}
		
		
		}	
 	} Main
import java.util.*;

public class Main {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		
		int n = sc.nextInt();
		String a = String.valueOf(n);
		
		char[] s = a.toCharArray();
		
		if(s[0] == '7'||s[1] == '7'||s[2] == '7') {
			System.out.println("Yes");
		}else {
			System.out.println("No");
		}
		
		
		}	
 	}

