Comments (4)
按你的思路写了一段代码,感觉比较次数并没有减少多少,而且非常的麻烦,要考虑上坡,下坡,还有中间值大于两边的情况,还有一边扫描完继续扫描另一边要防止进入死循环的情况,你看一下吧,我写的感觉很臃肿你可以优化一下https://github.com/xiaoyuzdy/Algorithms/blob/master/AlgorithmsTest/src/Num1_1_04/Num_1_04_18.java
我看了你写的这题是有问题的,比如int a[]={1,2,3,4,5,0,1};在不打乱顺序的情况你试一下会报异常的
from algorithms.
我覺得題意應該是默認array中有多個minima吧,所以我用了個random後的大數組,就是默認上升坡度的左邊一定有個min,或下降破的右邊有個min,想的比較簡單。你給的數組,反而會報錯,之前我也是沒想到。不過我這樣只搜一次是lgn,而題目說最差2lgn,所以我覺得答案應該是要兩次binary search,不過我也還沒想到
from algorithms.
不知道你看得是英文原版还是中文版的,我看的中文版这题的题意就比较模糊,没说数组中的数据有某种规律,而对于一般的乱序数组我觉得是达不到2lgn的(我想不到有什么办法可达实现这样的目标)
from algorithms.
嗯,即使是英文版,也蠻多題目題意模糊的,比如1.4.23
from algorithms.
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from algorithms.