import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);

		int A = sc.nextInt();
		boolean flg = false;

		while (true) {
			if (A % 10 == 7) {
				flg = true;
				break;
			}
			A = A / 10;
			if (A == 0) {
				break;
			}
		}

		if (flg) {
			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 A = sc.nextInt();
		boolean flg = false;

		while (true) {
			if (A % 10 == 7) {
				flg = true;
				break;
			}
			A = A / 10;
			if (A == 0) {
				break;
			}
		}

		if (flg) {
			System.out.println("Yes");
		} else {
			System.out.println("No");
		}
	}
} Main public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);

		int A = sc.nextInt();
		boolean flg = false;

		while (true) {
			if (A % 10 == 7) {
				flg = true;
				break;
			}
			A = A / 10;
			if (A == 0) {
				break;
			}
		}

		if (flg) {
			System.out.println("Yes");
		} else {
			System.out.println("No");
		}
	} main {
		Scanner sc = new Scanner(System.in);

		int A = sc.nextInt();
		boolean flg = false;

		while (true) {
			if (A % 10 == 7) {
				flg = true;
				break;
			}
			A = A / 10;
			if (A == 0) {
				break;
			}
		}

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

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);

		int A = sc.nextInt();
		boolean flg = false;

		while (true) {
			if (A % 10 == 7) {
				flg = true;
				break;
			}
			A = A / 10;
			if (A == 0) {
				break;
			}
		}

		if (flg) {
			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 A = sc.nextInt();
		boolean flg = false;

		while (true) {
			if (A % 10 == 7) {
				flg = true;
				break;
			}
			A = A / 10;
			if (A == 0) {
				break;
			}
		}

		if (flg) {
			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 A = sc.nextInt();
		boolean flg = false;

		while (true) {
			if (A % 10 == 7) {
				flg = true;
				break;
			}
			A = A / 10;
			if (A == 0) {
				break;
			}
		}

		if (flg) {
			System.out.println("Yes");
		} else {
			System.out.println("No");
		}
	}
}