import java.util.*;

class Main{
	public static void main(String[] args){
      Scanner sc = new Scanner(System.in);
      int N = sc.nextInt(); //3桁の整数
      
      int N_3 = N/100;
      int N_2 = (N/10)%10;
      int N_1 = N%10;
      
      if( N_3 == 7)
        System.out.println("Yes");
      else{
      	if( N_2 == 7)
          System.out.println("Yes");
        else{
        	if(N_1 == 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(); //3桁の整数
      
      int N_3 = N/100;
      int N_2 = (N/10)%10;
      int N_1 = N%10;
      
      if( N_3 == 7)
        System.out.println("Yes");
      else{
      	if( N_2 == 7)
          System.out.println("Yes");
        else{
        	if(N_1 == 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(); //3桁の整数
      
      int N_3 = N/100;
      int N_2 = (N/10)%10;
      int N_1 = N%10;
      
      if( N_3 == 7)
        System.out.println("Yes");
      else{
      	if( N_2 == 7)
          System.out.println("Yes");
        else{
        	if(N_1 == 7)
              System.out.println("Yes");
          	else
              System.out.println("No");
        }
      }
      
    } main {
      Scanner sc = new Scanner(System.in);
      int N = sc.nextInt(); //3桁の整数
      
      int N_3 = N/100;
      int N_2 = (N/10)%10;
      int N_1 = N%10;
      
      if( N_3 == 7)
        System.out.println("Yes");
      else{
      	if( N_2 == 7)
          System.out.println("Yes");
        else{
        	if(N_1 == 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 N_3 = N/100; N_3 N/100 N 100 int N_2 = (N/10)%10; N_2 (N/10)%10 (N/10) N 10 10 int N_1 = N%10; N_1 N%10 N 10 if( N_3 == 7)
        System.out.println("Yes");
      else{
      	if( N_2 == 7)
          System.out.println("Yes");
        else{
        	if(N_1 == 7)
              System.out.println("Yes");
          	else
              System.out.println("No");
        }
      } N_3 == 7 N_3 7 System.out.println("Yes") System.out.println System.out System System.out "Yes" {
      	if( N_2 == 7)
          System.out.println("Yes");
        else{
        	if(N_1 == 7)
              System.out.println("Yes");
          	else
              System.out.println("No");
        }
      } if( N_2 == 7)
          System.out.println("Yes");
        else{
        	if(N_1 == 7)
              System.out.println("Yes");
          	else
              System.out.println("No");
        } N_2 == 7 N_2 7 System.out.println("Yes") System.out.println System.out System System.out "Yes" {
        	if(N_1 == 7)
              System.out.println("Yes");
          	else
              System.out.println("No");
        } if(N_1 == 7)
              System.out.println("Yes");
          	else
              System.out.println("No"); N_1 == 7 N_1 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(); //3桁の整数
      
      int N_3 = N/100;
      int N_2 = (N/10)%10;
      int N_1 = N%10;
      
      if( N_3 == 7)
        System.out.println("Yes");
      else{
      	if( N_2 == 7)
          System.out.println("Yes");
        else{
        	if(N_1 == 7)
              System.out.println("Yes");
          	else
              System.out.println("No");
        }
      }
      
    }
}