Commit 9c65648

committed

q22

1 parent 5bb82d8 commit 9c65648Copy full SHA for 9c65648

File tree

+59

-0

lines changed

+59

-0

lines changed

Lines changed: 1 addition & 0 deletions

Original file line number	Diff line number	Diff line change
`@@ -0,0 +1 @@`
	`1`	`+mod q22;`

Lines changed: 58 additions & 0 deletions

Original file line number	Diff line number	Diff line change
`@@ -0,0 +1,58 @@`
	`1`	`+//! 数字 n代表生成括号的对数,请你设计一个函数,用于能够生成所有可能的并且有效的括号组合。`
	`2`	`+//!`
	`3`	`+//!`
	`4`	`+//! 示例 1:`
	`5`	`+//!`
	`6`	`+//! 输入:n = 3`
	`7`	`+//! 输出:["((()))","(()())","(())()","()(())","()()()"]`
	`8`	`+//! 示例 2:`
	`9`	`+//!`
	`10`	`+//! 输入:n = 1`
	`11`	`+//! 输出:["()"]`
	`12`	`+//!`
	`13`	`+`
	`14`	`+`
	`15`	`+struct Solution();`
	`16`	`+impl Solution {`
	`17`	`+ pub fn generate_parenthesis(n: i32) -> Vec<String> {`
	`18`	`+`
	`19`	`+`
	`20`	`+ fn back_track(s: String, open: i32, close: i32) -> Vec<String> {`
	`21`	`+ let mut res = vec![];`
	`22`	`+`
	`23`	`+ if open == 0 && close == 0 {`
	`24`	`+ return vec![s.to_owned()]`
	`25`	`+ }`
	`26`	`+`
	`27`	`+ if open > 0 {`
	`28`	`+ res.append(&mut back_track(s.clone()+"(", open-1, close+1));`
	`29`	`+ }`
	`30`	`+`
	`31`	`+ if close > 0 {`
	`32`	`+ res.append(&mut back_track(s.clone()+")", open.clone(), close-1));`
	`33`	`+ }`
	`34`	`+ res`
	`35`	`+`
	`36`	`+ }`
	`37`	`+`
	`38`	`+ back_track("".to_owned(), n, 0)`
	`39`	`+ }`
	`40`	`+}`
	`41`	`+`
	`42`	`+`
	`43`	`+`
	`44`	`+`
	`45`	`+#[cfg(test)]`
	`46`	`+mod tests {`
	`47`	`+ use super::*;`
	`48`	`+`
	`49`	`+ #[test]`
	`50`	`+ fn it_works() {`
	`51`	`+ let result = Solution::generate_parenthesis(2);`
	`52`	`+ println!("{:?}", result);`
	`53`	`+ assert_eq!(result.len(), 2);`
	`54`	`+ assert!(result.contains(&"(())".to_owned()));`
	`55`	`+ assert!(result.contains(&"()()".to_owned()));`
	`56`	`+`
	`57`	`+ }`
	`58`	`+}`

Comments

(0)