import java.util.*;
class Main {
    public static void main(String[] args) {
        Scanner sc= new Scanner(System.in);
        int n=sc.nextInt();
        int a=n%10;
        int b=(n/10)%10;
        int c=n/100;
        if(a==7||b==7||c==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