import java.util.*;

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