Daily LeetCode – day0048 0672. Bulb Switcher II

// 0672. Bulb Switcher II
class Solution {
    public int flipLights(int n, int presses) {
        if (presses == 0) {
            return 1;
        } else if (n == 1) {
            return 2;
        } else if (n == 2) {
            if (presses == 1) {
                return 3;
            } else {
                return 4;
            }
        } else {
            if (presses == 1) {
                return 4;
            } else if (presses  == 2) {
                return 7;
            } else {
                return 8;
            }
        }
    }
}

学习笔记：
今天这不是一道编程题了，完全变成了高智商数学推理逻辑题。