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