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