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Merge pull request #958 from Tiffany-yuan/master
update: 0376.摆动序列 js动态规划解法
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@ -261,6 +261,7 @@ func wiggleMaxLength(nums []int) int {
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```
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### Javascript
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**贪心**
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```Javascript
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var wiggleMaxLength = function(nums) {
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if(nums.length <= 1) return nums.length
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@ -277,6 +278,25 @@ var wiggleMaxLength = function(nums) {
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return result
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};
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```
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**动态规划**
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```Javascript
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var wiggleMaxLength = function(nums) {
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if (nums.length === 1) return 1;
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// 考虑前i个数,当第i个值作为峰谷时的情况(则第i-1是峰顶)
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let down = 1;
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// 考虑前i个数,当第i个值作为峰顶时的情况(则第i-1是峰谷)
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let up = 1;
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for (let i = 1; i < nums.length; i++) {
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if (nums[i] < nums[i - 1]) {
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down = Math.max(up + 1, down);
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}
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if (nums[i] > nums[i - 1]) {
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up = Math.max(down + 1, up)
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}
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}
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return Math.max(down, up);
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};
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```
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-----------------------
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<div align="center"><img src=https://code-thinking.cdn.bcebos.com/pics/01二维码一.jpg width=500> </img></div>
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