import java.util.*;
 
class Main {
  public static void main(String[] args) {
	Scanner scanner = new Scanner(System.in);
    
    int x = scanner.nextInt(); //next(文字列), nextDouble, nextLine(1行)とか
    if (x % 10 == 7){
      System.out.println("Yes");
    }
    
    else if ((x/10)%10 == 7){
      System.out.println("Yes");
    }
    
    else if ((x/100) == 7){      
    
    	System.out.println("Yes");
    }
    else{
    System.out.println("No");}
  }
}
/tmp/hf-datasets-cache/medium/datasets/42704881117311-config-parquet-and-info-qiankunmu-Project_CodeNet-896c9d36/hub/datasets--qiankunmu--Project_CodeNet_Python800_and_Java250/snapshots/c899fde44a77ba1cc14973ed3de064e4ff3aadc7/Project_CodeNet_Java250.tar.gz