import java.util.*;
 
class Main {
  public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    int N = sc.nextInt();
    if(("" + N).contains("7"))
      System.out.println("Yes");
    else System.out.println("No");
  }
} import java.util.*; util.* java class Main {
  public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    int N = sc.nextInt();
    if(("" + N).contains("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();
    if(("" + N).contains("7"))
      System.out.println("Yes");
    else System.out.println("No");
  } main {
    Scanner sc = new Scanner(System.in);
    int N = sc.nextInt();
    if(("" + N).contains("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 if(("" + N).contains("7"))
      System.out.println("Yes");
    else System.out.println("No"); ("" + N).contains("7") ("" + N).contains ("" + N) "" N "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.*;
 
class Main {
  public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    int N = sc.nextInt();
    if(("" + N).contains("7"))
      System.out.println("Yes");
    else System.out.println("No");
  }
}