import java.util.Scanner;
public class Main {
   
    public static void main(String[] args) { 
		Scanner sc = new Scanner(System.in);
int N=sc.nextInt();
if(N>=100&&N<=999){
    String s=String.valueOf(N);
    if(s.contains("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