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feat: add ts solution to lc problem: No.2147 (#2028)

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Lines changed: 21 additions & 0 deletions

Original file line number	Diff line number	Diff line change
`@@ -218,7 +218,28 @@ func numberOfWays(corridor string) int {`
`218`	`218`	`### TypeScript`
`219`	`219`
`220`	`220`	```ts
	`221`	`+function numberOfWays(corridor: string): number {`
	`222`	`+ const M: number = 1e9 + 7;`
	`223`	`+ const seatNumbers: number[] = [];`
`221`	`224`
	`225`	`+ for (let i = 0; i < corridor.length; i++) {`
	`226`	`+ if (corridor.charAt(i) === 'S') {`
	`227`	`+ seatNumbers.push(i);`
	`228`	`+ }`
	`229`	`+ }`
	`230`	`+`
	`231`	`+ if (seatNumbers.length % 2 !== 0 \|\| seatNumbers.length === 0) {`
	`232`	`+ return 0;`
	`233`	`+ }`
	`234`	`+`
	`235`	`+ let result: number = 1;`
	`236`	`+`
	`237`	`+ for (let i = 2; i < seatNumbers.length; i += 2) {`
	`238`	`+ result = (result * (seatNumbers[i] - seatNumbers[i - 1])) % M;`
	`239`	`+ }`
	`240`	`+`
	`241`	`+ return result;`
	`242`	`+}`
`222`	`243`	```
`223`	`244`
`224`	`245`	`### ...`

Lines changed: 21 additions & 0 deletions

Original file line number	Diff line number	Diff line change
`@@ -193,7 +193,28 @@ func numberOfWays(corridor string) int {`
`193`	`193`	`### TypeScript`
`194`	`194`
`195`	`195`	```ts
	`196`	`+function numberOfWays(corridor: string): number {`
	`197`	`+ const M: number = 1e9 + 7;`
	`198`	`+ const seatNumbers: number[] = [];`
`196`	`199`
	`200`	`+ for (let i = 0; i < corridor.length; i++) {`
	`201`	`+ if (corridor.charAt(i) === 'S') {`
	`202`	`+ seatNumbers.push(i);`
	`203`	`+ }`
	`204`	`+ }`
	`205`	`+`
	`206`	`+ if (seatNumbers.length % 2 !== 0 \|\| seatNumbers.length === 0) {`
	`207`	`+ return 0;`
	`208`	`+ }`
	`209`	`+`
	`210`	`+ let result: number = 1;`
	`211`	`+`
	`212`	`+ for (let i = 2; i < seatNumbers.length; i += 2) {`
	`213`	`+ result = (result * (seatNumbers[i] - seatNumbers[i - 1])) % M;`
	`214`	`+ }`
	`215`	`+`
	`216`	`+ return result;`
	`217`	`+}`
`197`	`218`	```
`198`	`219`
`199`	`220`	`### ...`

Lines changed: 22 additions & 0 deletions

Original file line number	Diff line number	Diff line change
`@@ -0,0 +1,22 @@`
	`1`	`+function numberOfWays(corridor: string): number {`
	`2`	`+ const M: number = 1e9 + 7;`
	`3`	`+ const seatNumbers: number[] = [];`
	`4`	`+`
	`5`	`+ for (let i = 0; i < corridor.length; i++) {`
	`6`	`+ if (corridor.charAt(i) === 'S') {`
	`7`	`+ seatNumbers.push(i);`
	`8`	`+ }`
	`9`	`+ }`
	`10`	`+`
	`11`	`+ if (seatNumbers.length % 2 !== 0 \|\| seatNumbers.length === 0) {`
	`12`	`+ return 0;`
	`13`	`+ }`
	`14`	`+`
	`15`	`+ let result: number = 1;`
	`16`	`+`
	`17`	`+ for (let i = 2; i < seatNumbers.length; i += 2) {`
	`18`	`+ result = (result * (seatNumbers[i] - seatNumbers[i - 1])) % M;`
	`19`	`+ }`
	`20`	`+`
	`21`	`+ return result;`
	`22`	`+}`

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