Commit 1113c71

authored

Merge pull request youngyangyang04#1620 from PanYuHaa/master

0463.岛屿的周长增加go解法;1356.根据数字二进制下 1 的数目排序增加go语言的解法

2 parents db079ab + d0d693f commit 1113c71Copy full SHA for 1113c71

File tree

+52

-0

lines changed

+52

-0

lines changed

Lines changed: 19 additions & 0 deletions

Original file line number	Diff line number	Diff line change
`@@ -179,6 +179,25 @@ class Solution:`
`179`	`179`	```
`180`	`180`
`181`	`181`	`Go:`
	`182`	+```go
	`183`	`+func islandPerimeter(grid [][]int) int {`
	`184`	`+ m, n := len(grid), len(grid[0])`
	`185`	`+ res := 0`
	`186`	`+ for i := 0; i < m; i++ {`
	`187`	`+ for j := 0; j < n; j++ {`
	`188`	`+ if grid[i][j] == 1 {`
	`189`	`+ res += 4`
	`190`	`+ // 上下左右四个方向`
	`191`	`+ if i > 0 && grid[i-1][j] == 1 {res--} // 上边有岛屿`
	`192`	`+ if i < m-1 && grid[i+1][j] == 1 {res--} // 下边有岛屿`
	`193`	`+ if j > 0 && grid[i][j-1] == 1 {res--} // 左边有岛屿`
	`194`	`+ if j < n-1 && grid[i][j+1] == 1 {res--} // 右边有岛屿`
	`195`	`+ }`
	`196`	`+ }`
	`197`	`+ }`
	`198`	`+ return res`
	`199`	`+}`
	`200`	+```
`182`	`201`
`183`	`202`	`JavaScript:`
`184`	`203`	```javascript

Lines changed: 33 additions & 0 deletions

Original file line number	Diff line number	Diff line change
`@@ -170,6 +170,39 @@ class Solution:`
`170`	`170`	`## Go`
`171`	`171`
`172`	`172`	```go
	`173`	`+func sortByBits(arr []int) []int {`
	`174`	`+ var tmp int`
	`175`	`+ for i := 0; i < len(arr); i++ {`
	`176`	`+ for j := i+1; j < len(arr); j++ {`
	`177`	`+ // 冒泡排序的手法,但是排序的规则从比大小变成了比位运算1的个数`
	`178`	`+ if isCmp(arr[i], arr[j]) {`
	`179`	`+ tmp = arr[i]`
	`180`	`+ arr[i] = arr[j]`
	`181`	`+ arr[j] = tmp`
	`182`	`+ }`
	`183`	`+ }`
	`184`	`+ }`
	`185`	`+ return arr`
	`186`	`+}`
	`187`	`+`
	`188`	`+func isCmp(a, b int) bool {`
	`189`	`+ bitA := bitCount(a)`
	`190`	`+ bitB := bitCount(b)`
	`191`	`+ if bitA == bitB {`
	`192`	`+ return a > b`
	`193`	`+ } else {`
	`194`	`+ return bitA > bitB`
	`195`	`+ }`
	`196`	`+}`
	`197`	`+`
	`198`	`+func bitCount(n int) int {`
	`199`	`+ count := 0`
	`200`	`+ for n != 0 {`
	`201`	`+ n &= (n-1) // 清除最低位的1`
	`202`	`+ count++`
	`203`	`+ }`
	`204`	`+ return count`
	`205`	`+}`
`173`	`206`	```
`174`	`207`
`175`	`208`	`## JavaScript`

Comments

(0)