import java.util.*;
class Main
{
  public static void main(String args[])
  {
    Scanner sc=new Scanner(System.in);
    int n=sc.nextInt();
    int k=0;
    while(n>0)
    {
      int d=n%10;
      if(d==7){
        k=1;
        System.out.println("Yes");
        break;
      }
      else
        n/=10;
    }
    if(k==0)
      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();
    int k=0;
    while(n>0)
    {
      int d=n%10;
      if(d==7){
        k=1;
        System.out.println("Yes");
        break;
      }
      else
        n/=10;
    }
    if(k==0)
      System.out.println("No");
  }
} Main public static void main(String args[])
  {
    Scanner sc=new Scanner(System.in);
    int n=sc.nextInt();
    int k=0;
    while(n>0)
    {
      int d=n%10;
      if(d==7){
        k=1;
        System.out.println("Yes");
        break;
      }
      else
        n/=10;
    }
    if(k==0)
      System.out.println("No");
  } main {
    Scanner sc=new Scanner(System.in);
    int n=sc.nextInt();
    int k=0;
    while(n>0)
    {
      int d=n%10;
      if(d==7){
        k=1;
        System.out.println("Yes");
        break;
      }
      else
        n/=10;
    }
    if(k==0)
      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 k=0; k 0 while(n>0)
    {
      int d=n%10;
      if(d==7){
        k=1;
        System.out.println("Yes");
        break;
      }
      else
        n/=10;
    } n>0 n 0 {
      int d=n%10;
      if(d==7){
        k=1;
        System.out.println("Yes");
        break;
      }
      else
        n/=10;
    } int d=n%10; d n%10 n 10 if(d==7){
        k=1;
        System.out.println("Yes");
        break;
      }
      else
        n/=10; d==7 d 7 {
        k=1;
        System.out.println("Yes");
        break;
      } k=1 k 1 System.out.println("Yes") System.out.println System.out System System.out "Yes" break; n/=10 n 10 if(k==0)
      System.out.println("No"); k==0 k 0 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();
    int k=0;
    while(n>0)
    {
      int d=n%10;
      if(d==7){
        k=1;
        System.out.println("Yes");
        break;
      }
      else
        n/=10;
    }
    if(k==0)
      System.out.println("No");
  }
}
