import java.util.Scanner;

public class Main {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int n = Integer.parseInt(sc.next());
        int num = 0;
        boolean flg = false;
        while (n > 0) {
            num = n % 10;
            if (num == 7) {
                flg = true;
                break;
            }
            n /= 10;
        }
        if (flg) {
            System.out.println("Yes");
        } else {
            System.out.println("No");
        }

        sc.close();
    }
} import java.util.Scanner; Scanner java.util public class Main {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int n = Integer.parseInt(sc.next());
        int num = 0;
        boolean flg = false;
        while (n > 0) {
            num = n % 10;
            if (num == 7) {
                flg = true;
                break;
            }
            n /= 10;
        }
        if (flg) {
            System.out.println("Yes");
        } else {
            System.out.println("No");
        }

        sc.close();
    }
} Main public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int n = Integer.parseInt(sc.next());
        int num = 0;
        boolean flg = false;
        while (n > 0) {
            num = n % 10;
            if (num == 7) {
                flg = true;
                break;
            }
            n /= 10;
        }
        if (flg) {
            System.out.println("Yes");
        } else {
            System.out.println("No");
        }

        sc.close();
    } main {
        Scanner sc = new Scanner(System.in);
        int n = Integer.parseInt(sc.next());
        int num = 0;
        boolean flg = false;
        while (n > 0) {
            num = n % 10;
            if (num == 7) {
                flg = true;
                break;
            }
            n /= 10;
        }
        if (flg) {
            System.out.println("Yes");
        } else {
            System.out.println("No");
        }

        sc.close();
    } Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int n = Integer.parseInt(sc.next()); n Integer.parseInt(sc.next()) Integer.parseInt Integer sc.next() sc.next sc int num = 0; num 0 boolean flg = false; flg false while (n > 0) {
            num = n % 10;
            if (num == 7) {
                flg = true;
                break;
            }
            n /= 10;
        } n > 0 n 0 {
            num = n % 10;
            if (num == 7) {
                flg = true;
                break;
            }
            n /= 10;
        } num = n % 10 num n % 10 n 10 if (num == 7) {
                flg = true;
                break;
            } num == 7 num 7 {
                flg = true;
                break;
            } flg = true flg true break; n /= 10 n 10 if (flg) {
            System.out.println("Yes");
        } else {
            System.out.println("No");
        } flg {
            System.out.println("Yes");
        } System.out.println("Yes") System.out.println System.out System System.out "Yes" {
            System.out.println("No");
        } System.out.println("No") System.out.println System.out System System.out "No" sc.close() sc.close sc String[] args args public class Main {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int n = Integer.parseInt(sc.next());
        int num = 0;
        boolean flg = false;
        while (n > 0) {
            num = n % 10;
            if (num == 7) {
                flg = true;
                break;
            }
            n /= 10;
        }
        if (flg) {
            System.out.println("Yes");
        } else {
            System.out.println("No");
        }

        sc.close();
    }
} public class Main {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int n = Integer.parseInt(sc.next());
        int num = 0;
        boolean flg = false;
        while (n > 0) {
            num = n % 10;
            if (num == 7) {
                flg = true;
                break;
            }
            n /= 10;
        }
        if (flg) {
            System.out.println("Yes");
        } else {
            System.out.println("No");
        }

        sc.close();
    }
} Main
import java.util.Scanner;

public class Main {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int n = Integer.parseInt(sc.next());
        int num = 0;
        boolean flg = false;
        while (n > 0) {
            num = n % 10;
            if (num == 7) {
                flg = true;
                break;
            }
            n /= 10;
        }
        if (flg) {
            System.out.println("Yes");
        } else {
            System.out.println("No");
        }

        sc.close();
    }
}
