class Solution:
    def jump(self,n):
        if n ==0:
            return 0
        elif n==1:
            return 1
        elif n ==1:
            return 2
        numN = 0
        first = 1
        second = 2
        for i in range(3,n+1):
            numN = first+second
            first = second
            second = numN
        return numN

if __name__ =='__main__':
    solution = Solution()
    time = solution.jump(5)
    print(time)