

import java.util.Scanner;

public class Main {

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

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        boolean found = false;
        while(n>0) {
            int val = n%10;
            if(val == 7) {
                System.out.println("Yes");
                found = true;
                break;
            }
            n = n/10;
        }
        if(!found) {
            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();
        boolean found = false;
        while(n>0) {
            int val = n%10;
            if(val == 7) {
                System.out.println("Yes");
                found = true;
                break;
            }
            n = n/10;
        }
        if(!found) {
            System.out.println("No");
        }
    }
}
