import java.util.Scanner;
class Main{
  public static void main(String[] args){
    Scanner scanner=new Scanner(System.in);
    int number=scanner.nextInt();
    int hundreds=number/100;
    int tens=number/10-hundreds*10;
    int ones=number-hundreds*100-tens*10;
    if(hundreds==7||tens==7||ones==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