bulb-switcher-ii_1_AC.cpp

// I would strongly advise against such problems.
// What are you trying to get from the interview? A smart-ass?
// https://discuss.leetcode.com/topic/102022/c-concise-code-o-1/2
class Solution {
public:
    int flipLights(int n, int m) {
        if (n == 0 || m == 0) {
            return 1;
        } else if (n == 1) {
            return 2;
        } else if (n == 2) {
            return m == 1 ? 3 : 4;
        } else if (m == 1) {
            return 4;
        } else {
            return m == 2 ? 7 : 8;
        }
    }
};