public class Solution { public int jumpFloorII(int target) { int f1=1; while(target>1) { target=target-1; f1=f1*2; } return f1; } }
public class Solution { public int jumpFloorII(int target) { int f1=1; while(target>1) { target=target-1; f1=f1*2; } return f1; } }