1) N employess in a party and one of them is CEO of the company. Identify who is the CEO?\n\tGiven that CEO is the ONLY person who satisfies these condition:\n\ta) Every other employee knows CEO.\n\tb) CEO knows no one.\n\t\n\tYou are given an API, ``` bool knows(int emp1, int emp2) ``` which will return ``` true ``` if ```emp1``` knows ```emp2```.\n\t\n\tI was able to come up with Time O(N^2) and Space O(1) complexity. But interviewer wanted Time complexity to be better.\n\n\n2)  https://leetcode.com/problems/move-zeroes/

1) N employess in a party and one of them is CEO of the company. Identify who is the CEO?\n\tGiven that CEO is the ONLY person who satisfies these condition:\n\