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GitBook: [greyireland#93] No subject

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`20`	`20`	`* [二分搜索](basic\_algorithm/binary\_search.md)`
`21`	`21`	`* [排序算法](basic\_algorithm/sort.md)`
`22`	`22`	`* [动态规划](basic\_algorithm/dp.md)`
`23`		`-* [位运算](ji-chu-suan-fa-pian/wei-yun-suan.md)`
`24`	`23`
`25`	`24`	`## 算法思维`
`26`	`25`

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`@@ -296,6 +296,40 @@ func rangeBitwiseAnd(m int, n int) int {`
`296`	`296`	`}`
`297`	`297`	```
`298`	`298`
	`299`	`+#### [Gray Code](https://leetcode.com/problems/gray-code/)`
	`300`	`+`
	`301`	+```cpp
	`302`	`+// Some code`
	`303`	`+class Solution {`
	`304`	`+public:`
	`305`	`+ vector<int> grayCode(int n) {`
	`306`	`+`
	`307`	`+ vector<int> ret;`
	`308`	`+ for(int i=0; i<n; i++)`
	`309`	`+ {`
	`310`	`+ if(i==0)`
	`311`	`+ {`
	`312`	`+ ret.push_back(0);`
	`313`	`+ ret.push_back(1);`
	`314`	`+ }`
	`315`	`+ else`
	`316`	`+ {`
	`317`	`+ int sum = 1<<i;`
	`318`	`+ int isize = ret.size();`
	`319`	`+ for(int j=isize-1; j>=0; j--)`
	`320`	`+ {`
	`321`	`+ ret.push_back(ret[j]+sum);`
	`322`	`+ }`
	`323`	`+ }`
	`324`	`+ }`
	`325`	`+`
	`326`	`+ return ret;`
	`327`	`+`
	`328`	`+ }`
	`329`	`+};`
	`330`	`+`
	`331`	+```
	`332`	`+`
`299`	`333`	`## 练习`
`300`	`334`
`301`	`335`	`* [ ] [single-number](https://leetcode-cn.com/problems/single-number/)`

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