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1818. Quantity of Triples

Time Limit: 1 seconds
Memory Limit:262144KB
Points:100
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Дано целое число N. Найти, сколько раз встречается цифра 3 в записи числа N3.

Input

Одно целое число N (-1000 ≤ N ≤ 1000)

Output

Одно целое число - ответ.

Sample

InputOutput
7

2
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Problems from Contests and Camps / School olympiads and couses of Vologda region / Different Contests / Contest VML for 7 Form, cycles /
707. 10 - Длинный НОД 1818. 1819. 12 - Maximum of triples 1820. 13 - Unique numbers 1821. 14 - Prime or not prime?
time generating 0.375 sec.
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