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二分算法(Binary Search) · App Inventor 2 中文网
...:
App随机给出的数字是17,我们依次猜的是:
(1 +100)/2 = 50(大了) 1 50 100
(1 +50)/2 = 25(大了) 1 25 50
(1 +25)/2 = 13(小了) 1 13 25
(13+25)/2 = 19(大了) 13 19 25
(13+19)/2 = 16(小了) 13 16 19
(16+19)/2 = 17(猜中) 16 17 19
...
二分算法(Binary Search) · App Inventor 2 中文网
...:
App随机给出的数字是17,我们依次猜的是:
(1 +100)/2 = 50(大了) 1 50 100
(1 +50)/2 = 25(大了) 1 25 50
(1 +25)/2 = 13(小了) 1 13 25
(13+25)/2 = 19(大了) 13 19 25
(13+19)/2 = 16(小了) 13 16 19
(16+19)/2 = 17(猜中) 16 17 19
...
二分算法(Binary Search) · App Inventor 2 中文网
...:
App随机给出的数字是17,我们依次猜的是:
(1 +100)/2 = 50(大了) 1 50 100
(1 +50)/2 = 25(大了) 1 25 50
(1 +25)/2 = 13(小了) 1 13 25
(13+25)/2 = 19(大了) 13 19 25
(13+19)/2 = 16(小了) 13 16 19
(16+19)/2 = 17(猜中) 16 17 19
...
二分算法(Binary Search) · App Inventor 2 中文网
...:
App随机给出的数字是17,我们依次猜的是:
(1 +100)/2 = 50(大了) 1 50 100
(1 +50)/2 = 25(大了) 1 25 50
(1 +25)/2 = 13(小了) 1 13 25
(13+25)/2 = 19(大了) 13 19 25
(13+19)/2 = 16(小了) 13 16 19
(16+19)/2 = 17(猜中) 16 17 19
...
二分算法(Binary Search) · App Inventor 2 中文网
...:
App随机给出的数字是17,我们依次猜的是:
(1 +100)/2 = 50(大了) 1 50 100
(1 +50)/2 = 25(大了) 1 25 50
(1 +25)/2 = 13(小了) 1 13 25
(13+25)/2 = 19(大了) 13 19 25
(13+19)/2 = 16(小了) 13 16 19
(16+19)/2 = 17(猜中) 16 17 19
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Why dict.get(key) instead of dict[key]?
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edited Apr 7 '17 at 7:22
Jean-François Corbett
33.6k2525 gold badges124124 silver badges172172 bronze badges
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What is the difference between float and double?
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528
Huge difference.
As the name implies, a double has 2x the precision of float[1]. In general a d...
What regular expression will match valid international phone numbers?
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23 Answers
23
Active
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How to convert a table to a data frame
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324
I figured it out already:
as.data.frame.matrix(mytable)
does what I need -- apparently, the...
