public class Solution {
    public int jumpFloor(int target) {
        int[] dp = new int[41];
        dp[1] = 1;
        dp[2] = 2;
        for(int i = 3; i < 40; i++) {
            dp[i] = dp[i - 2] + dp[i - 1];
        }
        return dp[target];
    }
}