Codeforces 122A - Lucky Division
Petya loves lucky numbers. Everybody knows that lucky numbers are positive integers whose decimal representation contains only the lucky digits 4 and 7. For example, numbers 47, 744, 4 are lucky and 5, 17, 467 are not.
Petya calls a number almost lucky if it could be evenly divided by some lucky number. Help him find out if the given number n is almost lucky.
Input:
The single line contains an integer n (1 ≤ n ≤ 1000) — the number that needs to be checked.
Output:
In the only line print “YES” (without the quotes), if number n is almost lucky. Otherwise, print “NO” (without the quotes).
範例:
input:
1 | 47 |
output:
1 | YES |
input:
1 | 16 |
output:
1 | YES |
input:
1 | 78 |
output:
1 | NO |
Note:
Note that all lucky numbers are almost lucky as any number is evenly divisible by itself.
In the first sample 47 is a lucky number. In the second sample 16 is divisible by 4.
題意:
找出信幸運數字。
思路:
這題再找一個幸運的數字，因為N小於1000所以我們直接把1000以內幸運數字存在陣列裡面，題目也說道如果有數字可以被幸運數字整除，那麼它也是幸運數字。