fibonacci
注意不能用迭代,会超时
python:
1 # -*- coding:utf-8 -*- 2 class Solution: 3 def Fibonacci(self, n): 4 # write code here 5 lst = [0,1] 6 if n<2: 7 return lst[n] 8 while n>len(lst)-1: 9 lst.append(lst[-1]+lst[-2]) 10 return lst[n]
c++
1 class Solution { 2 public: 3 int Fibonacci(int n) { 4 deque<int> que; 5 que.push_back(0); 6 que.push_back(1); 7 if(n<2) return que[n]; 8 while(n>=2){ 9 que.push_back(que[0]+que[1]); 10 que.pop_front(); 11 n--; 12 } 13 return que[1]; 14 } 15 };