import java.util.Scanner;
public class Main{
	  public static void main(String args[]){
	 Scanner scanner = new Scanner(System.in);

int a=scanner.nextInt();
int h=a%100;
int t=h%10;

if(a/100==7) {
	System.out.println("Yes");
}
else if(h/10==7) {
	System.out.println("Yes");
}
else if(t==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