Commit facd6a7

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add q384

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Original file line number	Diff line number	Diff line change
`@@ -55,6 +55,7 @@`
`55`	`55`	`* [q54_螺旋矩阵](/src/数组操作/q54_螺旋矩阵)`
`56`	`56`	`* [q73_矩阵置零](/src/数组操作/q73_矩阵置零)`
`57`	`57`	`* [q78_子集](/src/数组操作/q78_子集)`
	`58`	`+* [q384_打乱数组](/src/数组操作/q384_打乱数组)`
`58`	`59`	`* [q581_最短无序连续子数组](/src/数组操作/q581_最短无序连续子数组)`
`59`	`60`	`* [q945_使数组唯一的最小增量](/src/数组操作/q945_使数组唯一的最小增量)`
`60`	`61`

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	`1`	`+package 数组操作.q384_打乱数组;`
	`2`	`+`
	`3`	`+import java.util.ArrayList;`
	`4`	`+import java.util.List;`
	`5`	`+import java.util.Random;`
	`6`	`+`
	`7`	`+/**`
	`8`	`+ * 洗牌算法 o(n)`
	`9`	`+ */`
	`10`	`+public class Solution {`
	`11`	`+ private int[] array;`
	`12`	`+ private int[] original;`
	`13`	`+`
	`14`	`+ private Random rand = new Random();`
	`15`	`+`
	`16`	`+ private List<Integer> getArrayCopy() {`
	`17`	`+ List<Integer> asList = new ArrayList<>();`
	`18`	`+ for (int i = 0; i < array.length; i++) {`
	`19`	`+ asList.add(array[i]);`
	`20`	`+ }`
	`21`	`+ return asList;`
	`22`	`+ }`
	`23`	`+`
	`24`	`+ public Solution(int[] nums) {`
	`25`	`+ array = nums;`
	`26`	`+ original = nums.clone();`
	`27`	`+ }`
	`28`	`+`
	`29`	`+ public int[] reset() {`
	`30`	`+ array = original;`
	`31`	`+ original = original.clone();`
	`32`	`+ return array;`
	`33`	`+ }`
	`34`	`+`
	`35`	`+ public int[] shuffle() {`
	`36`	`+ List<Integer> aux = getArrayCopy();`
	`37`	`+`
	`38`	`+ for (int i = 0; i < array.length; i++) {`
	`39`	`+ int removeIdx = rand.nextInt(aux.size());`
	`40`	`+ array[i] = aux.get(removeIdx);`
	`41`	`+ aux.remove(removeIdx);`
	`42`	`+ }`
	`43`	`+`
	`44`	`+ return array;`
	`45`	`+ }`
	`46`	`+}`

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