import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        int value = n / 10 * 10;
        int flag = 0;
        if (n - value == 7) {
            flag = 1;
        }

        value = n / 10;
        value = value / 10 * 10;
        if (n / 10 - value == 7) {
            flag = 1;
        }

        if (n / 100 == 7) {
            flag = 1;
        }

        if (flag == 1) {
            System.out.println("Yes");
        } else {
            System.out.println("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();
        int value = n / 10 * 10;
        int flag = 0;
        if (n - value == 7) {
            flag = 1;
        }

        value = n / 10;
        value = value / 10 * 10;
        if (n / 10 - value == 7) {
            flag = 1;
        }

        if (n / 100 == 7) {
            flag = 1;
        }

        if (flag == 1) {
            System.out.println("Yes");
        } else {
            System.out.println("No");
        }
    }
} Main public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        int value = n / 10 * 10;
        int flag = 0;
        if (n - value == 7) {
            flag = 1;
        }

        value = n / 10;
        value = value / 10 * 10;
        if (n / 10 - value == 7) {
            flag = 1;
        }

        if (n / 100 == 7) {
            flag = 1;
        }

        if (flag == 1) {
            System.out.println("Yes");
        } else {
            System.out.println("No");
        }
    } main {
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        int value = n / 10 * 10;
        int flag = 0;
        if (n - value == 7) {
            flag = 1;
        }

        value = n / 10;
        value = value / 10 * 10;
        if (n / 10 - value == 7) {
            flag = 1;
        }

        if (n / 100 == 7) {
            flag = 1;
        }

        if (flag == 1) {
            System.out.println("Yes");
        } else {
            System.out.println("No");
        }
    } Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int n = sc.nextInt(); n sc.nextInt() sc.nextInt sc int value = n / 10 * 10; value n / 10 * 10 n / 10 n 10 10 int flag = 0; flag 0 if (n - value == 7) {
            flag = 1;
        } n - value == 7 n - value n value 7 {
            flag = 1;
        } flag = 1 flag 1 value = n / 10 value n / 10 n 10 value = value / 10 * 10 value value / 10 * 10 value / 10 value 10 10 if (n / 10 - value == 7) {
            flag = 1;
        } n / 10 - value == 7 n / 10 - value n / 10 n 10 value 7 {
            flag = 1;
        } flag = 1 flag 1 if (n / 100 == 7) {
            flag = 1;
        } n / 100 == 7 n / 100 n 100 7 {
            flag = 1;
        } flag = 1 flag 1 if (flag == 1) {
            System.out.println("Yes");
        } else {
            System.out.println("No");
        } flag == 1 flag 1 {
            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" String[] args args public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        int value = n / 10 * 10;
        int flag = 0;
        if (n - value == 7) {
            flag = 1;
        }

        value = n / 10;
        value = value / 10 * 10;
        if (n / 10 - value == 7) {
            flag = 1;
        }

        if (n / 100 == 7) {
            flag = 1;
        }

        if (flag == 1) {
            System.out.println("Yes");
        } else {
            System.out.println("No");
        }
    }
} public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        int value = n / 10 * 10;
        int flag = 0;
        if (n - value == 7) {
            flag = 1;
        }

        value = n / 10;
        value = value / 10 * 10;
        if (n / 10 - value == 7) {
            flag = 1;
        }

        if (n / 100 == 7) {
            flag = 1;
        }

        if (flag == 1) {
            System.out.println("Yes");
        } else {
            System.out.println("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();
        int value = n / 10 * 10;
        int flag = 0;
        if (n - value == 7) {
            flag = 1;
        }

        value = n / 10;
        value = value / 10 * 10;
        if (n / 10 - value == 7) {
            flag = 1;
        }

        if (n / 100 == 7) {
            flag = 1;
        }

        if (flag == 1) {
            System.out.println("Yes");
        } else {
            System.out.println("No");
        }
    }
}