Commit 6821a29

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feat: add cs solution to lc problem: No.2391 (doocs#1990)

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Original file line number	Diff line number	Diff line change
`@@ -365,6 +365,27 @@ impl Solution {`
`365`	`365`	`}`
`366`	`366`	```
`367`	`367`
	`368`	`+### C#`
	`369`	`+`
	`370`	+```cs
	`371`	`+public class Solution {`
	`372`	`+ public int GarbageCollection(string[] garbage, int[] travel) {`
	`373`	`+ int len = garbage.Length;`
	`374`	`+ int res = 0;`
	`375`	`+ HashSet<char> s = new HashSet<char>();`
	`376`	`+ for (int i = len - 1; i >= 0; i--) {`
	`377`	`+ foreach (char ch in garbage[i].ToCharArray()) {`
	`378`	`+ if (!s.Contains(ch))`
	`379`	`+ s.Add(ch);`
	`380`	`+ }`
	`381`	`+ res += garbage[i].Length;`
	`382`	`+ res += i > 0 ? s.Count * travel[i - 1] : 0;`
	`383`	`+ }`
	`384`	`+ return res;`
	`385`	`+ }`
	`386`	`+}`
	`387`	+```
	`388`	`+`
`368`	`389`	`### ...`
`369`	`390`
`370`	`391`	```

Lines changed: 21 additions & 0 deletions

Original file line number	Diff line number	Diff line change
`@@ -346,6 +346,27 @@ impl Solution {`
`346`	`346`	`}`
`347`	`347`	```
`348`	`348`
	`349`	`+### C#`
	`350`	`+`
	`351`	+```cs
	`352`	`+public class Solution {`
	`353`	`+ public int GarbageCollection(string[] garbage, int[] travel) {`
	`354`	`+ int len = garbage.Length;`
	`355`	`+ int res = 0;`
	`356`	`+ HashSet<char> s = new HashSet<char>();`
	`357`	`+ for (int i = len - 1; i >= 0; i--) {`
	`358`	`+ foreach (char ch in garbage[i].ToCharArray()) {`
	`359`	`+ if (!s.Contains(ch))`
	`360`	`+ s.Add(ch);`
	`361`	`+ }`
	`362`	`+ res += garbage[i].Length;`
	`363`	`+ res += i > 0 ? s.Count * travel[i - 1] : 0;`
	`364`	`+ }`
	`365`	`+ return res;`
	`366`	`+ }`
	`367`	`+}`
	`368`	+```
	`369`	`+`
`349`	`370`	`### ...`
`350`	`371`
`351`	`372`	```

Lines changed: 16 additions & 0 deletions

Original file line number	Diff line number	Diff line change
`@@ -0,0 +1,16 @@`
	`1`	`+public class Solution {`
	`2`	`+ public int GarbageCollection(string[] garbage, int[] travel) {`
	`3`	`+ int len = garbage.Length;`
	`4`	`+ int res = 0;`
	`5`	`+ HashSet<char> s = new HashSet<char>();`
	`6`	`+ for (int i = len - 1; i >= 0; i--) {`
	`7`	`+ foreach (char ch in garbage[i].ToCharArray()) {`
	`8`	`+ if (!s.Contains(ch))`
	`9`	`+ s.Add(ch);`
	`10`	`+ }`
	`11`	`+ res += garbage[i].Length;`
	`12`	`+ res += i > 0 ? s.Count * travel[i - 1] : 0;`
	`13`	`+ }`
	`14`	`+ return res;`
	`15`	`+ }`
	`16`	`+}`

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