import java.util.Scanner;

public class Main {
	public static void main(String[] args){
    	Scanner sc = new Scanner(System.in);
    	int N = sc.nextInt();
      	boolean res = false;
      	while(N>0){
          	int x = N%10;
          	if(x==7){
            	res = true;
              	break;
            }
          	N/=10;
        }
      	if(res) System.out.print("Yes");
      	else System.out.print("No");
    }
} import java.util.Scanner; Scanner java.util public class Main {
	public static void main(String[] args){
    	Scanner sc = new Scanner(System.in);
    	int N = sc.nextInt();
      	boolean res = false;
      	while(N>0){
          	int x = N%10;
          	if(x==7){
            	res = true;
              	break;
            }
          	N/=10;
        }
      	if(res) System.out.print("Yes");
      	else System.out.print("No");
    }
} Main public static void main(String[] args){
    	Scanner sc = new Scanner(System.in);
    	int N = sc.nextInt();
      	boolean res = false;
      	while(N>0){
          	int x = N%10;
          	if(x==7){
            	res = true;
              	break;
            }
          	N/=10;
        }
      	if(res) System.out.print("Yes");
      	else System.out.print("No");
    } main {
    	Scanner sc = new Scanner(System.in);
    	int N = sc.nextInt();
      	boolean res = false;
      	while(N>0){
          	int x = N%10;
          	if(x==7){
            	res = true;
              	break;
            }
          	N/=10;
        }
      	if(res) System.out.print("Yes");
      	else System.out.print("No");
    } Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int N = sc.nextInt(); N sc.nextInt() sc.nextInt sc boolean res = false; res false while(N>0){
          	int x = N%10;
          	if(x==7){
            	res = true;
              	break;
            }
          	N/=10;
        } N>0 N 0 {
          	int x = N%10;
          	if(x==7){
            	res = true;
              	break;
            }
          	N/=10;
        } int x = N%10; x N%10 N 10 if(x==7){
            	res = true;
              	break;
            } x==7 x 7 {
            	res = true;
              	break;
            } res = true res true break; N/=10 N 10 if(res) System.out.print("Yes");
      	else System.out.print("No"); res System.out.print("Yes") System.out.print System.out System System.out "Yes" System.out.print("No") System.out.print System.out System System.out "No" String[] args args public class Main {
	public static void main(String[] args){
    	Scanner sc = new Scanner(System.in);
    	int N = sc.nextInt();
      	boolean res = false;
      	while(N>0){
          	int x = N%10;
          	if(x==7){
            	res = true;
              	break;
            }
          	N/=10;
        }
      	if(res) System.out.print("Yes");
      	else System.out.print("No");
    }
} public class Main {
	public static void main(String[] args){
    	Scanner sc = new Scanner(System.in);
    	int N = sc.nextInt();
      	boolean res = false;
      	while(N>0){
          	int x = N%10;
          	if(x==7){
            	res = true;
              	break;
            }
          	N/=10;
        }
      	if(res) System.out.print("Yes");
      	else System.out.print("No");
    }
} Main
import java.util.Scanner;

public class Main {
	public static void main(String[] args){
    	Scanner sc = new Scanner(System.in);
    	int N = sc.nextInt();
      	boolean res = false;
      	while(N>0){
          	int x = N%10;
          	if(x==7){
            	res = true;
              	break;
            }
          	N/=10;
        }
      	if(res) System.out.print("Yes");
      	else System.out.print("No");
    }
}