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feat: add rust solution to lc problem: No.3443 (#4509)

No.3443.Maximum Manhattan Distance After K Changes

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Original file line number	Diff line number	Diff line change
`@@ -279,6 +279,38 @@ function maxDistance(s: string, k: number): number {`
`279`	`279`	`}`
`280`	`280`	```
`281`	`281`
	`282`	`+#### Rust`
	`283`	`+`
	`284`	+```rust
	`285`	`+impl Solution {`
	`286`	`+ pub fn max_distance(s: String, k: i32) -> i32 {`
	`287`	`+ fn calc(s: &str, a: char, b: char, k: i32) -> i32 {`
	`288`	`+ let mut ans = 0;`
	`289`	`+ let mut mx = 0;`
	`290`	`+ let mut cnt = 0;`
	`291`	`+ for c in s.chars() {`
	`292`	`+ if c == a \|\| c == b {`
	`293`	`+ mx += 1;`
	`294`	`+ } else if cnt < k {`
	`295`	`+ mx += 1;`
	`296`	`+ cnt += 1;`
	`297`	`+ } else {`
	`298`	`+ mx -= 1;`
	`299`	`+ }`
	`300`	`+ ans = ans.max(mx);`
	`301`	`+ }`
	`302`	`+ ans`
	`303`	`+ }`
	`304`	`+`
	`305`	`+ let a = calc(&s, 'S', 'E', k);`
	`306`	`+ let b = calc(&s, 'S', 'W', k);`
	`307`	`+ let c = calc(&s, 'N', 'E', k);`
	`308`	`+ let d = calc(&s, 'N', 'W', k);`
	`309`	`+ a.max(b).max(c).max(d)`
	`310`	`+ }`
	`311`	`+}`
	`312`	+```
	`313`	`+`
`282`	`314`	`<!-- tabs:end -->`
`283`	`315`
`284`	`316`	`<!-- solution:end -->`

Lines changed: 32 additions & 0 deletions

Original file line number	Diff line number	Diff line change
`@@ -275,6 +275,38 @@ function maxDistance(s: string, k: number): number {`
`275`	`275`	`}`
`276`	`276`	```
`277`	`277`
	`278`	`+#### Rust`
	`279`	`+`
	`280`	+```rust
	`281`	`+impl Solution {`
	`282`	`+ pub fn max_distance(s: String, k: i32) -> i32 {`
	`283`	`+ fn calc(s: &str, a: char, b: char, k: i32) -> i32 {`
	`284`	`+ let mut ans = 0;`
	`285`	`+ let mut mx = 0;`
	`286`	`+ let mut cnt = 0;`
	`287`	`+ for c in s.chars() {`
	`288`	`+ if c == a \|\| c == b {`
	`289`	`+ mx += 1;`
	`290`	`+ } else if cnt < k {`
	`291`	`+ mx += 1;`
	`292`	`+ cnt += 1;`
	`293`	`+ } else {`
	`294`	`+ mx -= 1;`
	`295`	`+ }`
	`296`	`+ ans = ans.max(mx);`
	`297`	`+ }`
	`298`	`+ ans`
	`299`	`+ }`
	`300`	`+`
	`301`	`+ let a = calc(&s, 'S', 'E', k);`
	`302`	`+ let b = calc(&s, 'S', 'W', k);`
	`303`	`+ let c = calc(&s, 'N', 'E', k);`
	`304`	`+ let d = calc(&s, 'N', 'W', k);`
	`305`	`+ a.max(b).max(c).max(d)`
	`306`	`+ }`
	`307`	`+}`
	`308`	+```
	`309`	`+`
`278`	`310`	`<!-- tabs:end -->`
`279`	`311`
`280`	`312`	`<!-- solution:end -->`

Lines changed: 27 additions & 0 deletions

Original file line number	Diff line number	Diff line change
`@@ -0,0 +1,27 @@`
	`1`	`+impl Solution {`
	`2`	`+ pub fn max_distance(s: String, k: i32) -> i32 {`
	`3`	`+ fn calc(s: &str, a: char, b: char, k: i32) -> i32 {`
	`4`	`+ let mut ans = 0;`
	`5`	`+ let mut mx = 0;`
	`6`	`+ let mut cnt = 0;`
	`7`	`+ for c in s.chars() {`
	`8`	`+ if c == a \|\| c == b {`
	`9`	`+ mx += 1;`
	`10`	`+ } else if cnt < k {`
	`11`	`+ mx += 1;`
	`12`	`+ cnt += 1;`
	`13`	`+ } else {`
	`14`	`+ mx -= 1;`
	`15`	`+ }`
	`16`	`+ ans = ans.max(mx);`
	`17`	`+ }`
	`18`	`+ ans`
	`19`	`+ }`
	`20`	`+`
	`21`	`+ let a = calc(&s, 'S', 'E', k);`
	`22`	`+ let b = calc(&s, 'S', 'W', k);`
	`23`	`+ let c = calc(&s, 'N', 'E', k);`
	`24`	`+ let d = calc(&s, 'N', 'W', k);`
	`25`	`+ a.max(b).max(c).max(d)`
	`26`	`+ }`
	`27`	`+}`

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