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