import java.util.Scanner;

class Main{
    public static void main(String[] args){
        Scanner stdIn = new Scanner(System.in);
        int N = stdIn.nextInt();
        int is7 =0;
        
        if(N/100 == 7){
            is7 = 1;
        }
        N=N-(N/100)*100;
        if(N/10 == 7){
            is7 =1;
        }
        N=N-(N/10)*10;
        if(N == 7){
            is7 = 1;
        }

        if(is7 == 1)
            System.out.print("Yes");
        else
            System.out.print("No");
        
    }
} import java.util.Scanner; Scanner java.util class Main{
    public static void main(String[] args){
        Scanner stdIn = new Scanner(System.in);
        int N = stdIn.nextInt();
        int is7 =0;
        
        if(N/100 == 7){
            is7 = 1;
        }
        N=N-(N/100)*100;
        if(N/10 == 7){
            is7 =1;
        }
        N=N-(N/10)*10;
        if(N == 7){
            is7 = 1;
        }

        if(is7 == 1)
            System.out.print("Yes");
        else
            System.out.print("No");
        
    }
} Main public static void main(String[] args){
        Scanner stdIn = new Scanner(System.in);
        int N = stdIn.nextInt();
        int is7 =0;
        
        if(N/100 == 7){
            is7 = 1;
        }
        N=N-(N/100)*100;
        if(N/10 == 7){
            is7 =1;
        }
        N=N-(N/10)*10;
        if(N == 7){
            is7 = 1;
        }

        if(is7 == 1)
            System.out.print("Yes");
        else
            System.out.print("No");
        
    } main {
        Scanner stdIn = new Scanner(System.in);
        int N = stdIn.nextInt();
        int is7 =0;
        
        if(N/100 == 7){
            is7 = 1;
        }
        N=N-(N/100)*100;
        if(N/10 == 7){
            is7 =1;
        }
        N=N-(N/10)*10;
        if(N == 7){
            is7 = 1;
        }

        if(is7 == 1)
            System.out.print("Yes");
        else
            System.out.print("No");
        
    } Scanner stdIn = new Scanner(System.in); stdIn new Scanner(System.in) int N = stdIn.nextInt(); N stdIn.nextInt() stdIn.nextInt stdIn int is7 =0; is7 0 if(N/100 == 7){
            is7 = 1;
        } N/100 == 7 N/100 N 100 7 {
            is7 = 1;
        } is7 = 1 is7 1 N=N-(N/100)*100 N N-(N/100)*100 N (N/100)*100 (N/100) N 100 100 if(N/10 == 7){
            is7 =1;
        } N/10 == 7 N/10 N 10 7 {
            is7 =1;
        } is7 =1 is7 1 N=N-(N/10)*10 N N-(N/10)*10 N (N/10)*10 (N/10) N 10 10 if(N == 7){
            is7 = 1;
        } N == 7 N 7 {
            is7 = 1;
        } is7 = 1 is7 1 if(is7 == 1)
            System.out.print("Yes");
        else
            System.out.print("No"); is7 == 1 is7 1 System.out.print("Yes") System.out.print System.out System System.out "Yes" System.out.print("No") System.out.print System.out System System.out "No" String[] args args
import java.util.Scanner;

class Main{
    public static void main(String[] args){
        Scanner stdIn = new Scanner(System.in);
        int N = stdIn.nextInt();
        int is7 =0;
        
        if(N/100 == 7){
            is7 = 1;
        }
        N=N-(N/100)*100;
        if(N/10 == 7){
            is7 =1;
        }
        N=N-(N/10)*10;
        if(N == 7){
            is7 = 1;
        }

        if(is7 == 1)
            System.out.print("Yes");
        else
            System.out.print("No");
        
    }
}