Sift The Numbers

CodeChefOpen on judge ↗

A greek once sifted some numbers. And it did something wonderful! ###Input: - First line will contain an integer $N$ ###Output: Output in a single line answer to the problem. ###Constraints - $1 \leq N \leq 10^5$ ###Sample Input 1: 10 ###Sample Output 1: 4 ###Sample Input 2: 20 ###Sample Output 2: 8

HINT LADDERno hints yet

L1 Observation

L2 Technique

L3 Approach

L4 Pseudo-code

🔒

L5 Full solution

L5 unlocks only if you insist twice

solution.cppC++17

CodeSearch Tutor

Hints, not spoilers — it won’t hand over the full solution unless you insist.

voice by Sarvam AI