class Solution { public: int jumpFloorII(int number) { int res[25] = {0}; res[0] = 1; res[1] = 1; for (int i = 2; i <= number; ++i) { res[i] = 2 * res[i-1]; } return res[number]; } };
class Solution { public: int jumpFloorII(int number) { int res[25] = {0}; res[0] = 1; res[1] = 1; for (int i = 2; i <= number; ++i) { res[i] = 2 * res[i-1]; } return res[number]; } };