Commit 42c5fa7

authored

Merge pull request youngyangyang04#1277 from xiaofei-2020/dp11

添加(背包理论基础01背包-1.md):增加typescript版本

2 parents d47cbeb + 5440c3d commit 42c5fa7Copy full SHA for 42c5fa7

File tree

1 file changed

+42

-0

lines changed

problems
- 背包理论基础01背包-1.md

1 file changed

+42

-0

lines changed

`‎problems/背包理论基础01背包-1.md`

Lines changed: 42 additions & 0 deletions

Original file line number	Diff line number	Diff line change
`@@ -432,5 +432,47 @@ function test () {`
`432`	`432`	`test();`
`433`	`433`	```
`434`	`434`
	`435`	`+### TypeScript`
	`436`	`+`
	`437`	+```typescript
	`438`	`+function testWeightBagProblem(`
	`439`	`+ weight: number[],`
	`440`	`+ value: number[],`
	`441`	`+ size: number`
	`442`	`+): number {`
	`443`	`+ /**`
	`444`	`+ * dp[i][j]: 前i个物品,背包容量为j,能获得的最大价值`
	`445`	`+ * dp[0][*]: u=weight[0],u之前为0,u之后(含u)为value[0]`
	`446`	`+ * dp[*][0]: 0`
	`447`	`+ * ...`
	`448`	`+ * dp[i][j]: max(dp[i-1][j], dp[i-1][j-weight[i]]+value[i]);`
	`449`	`+ */`
	`450`	`+ const goodsNum: number = weight.length;`
	`451`	`+ const dp: number[][] = new Array(goodsNum)`
	`452`	`+ .fill(0)`
	`453`	`+ .map((_) => new Array(size + 1).fill(0));`
	`454`	`+ for (let i = weight[0]; i <= size; i++) {`
	`455`	`+ dp[0][i] = value[0];`
	`456`	`+ }`
	`457`	`+ for (let i = 1; i < goodsNum; i++) {`
	`458`	`+ for (let j = 1; j <= size; j++) {`
	`459`	`+ if (j < weight[i]) {`
	`460`	`+ dp[i][j] = dp[i - 1][j];`
	`461`	`+ } else {`
	`462`	`+ dp[i][j] = Math.max(dp[i - 1][j], dp[i - 1][j - weight[i]] + value[i]);`
	`463`	`+ }`
	`464`	`+ }`
	`465`	`+ }`
	`466`	`+ return dp[goodsNum - 1][size];`
	`467`	`+}`
	`468`	`+// test`
	`469`	`+const weight = [1, 3, 4];`
	`470`	`+const value = [15, 20, 30];`
	`471`	`+const size = 4;`
	`472`	`+console.log(testWeightBagProblem(weight, value, size));`
	`473`	+```
	`474`	`+`
	`475`	`+`
	`476`	`+`
`435`	`477`	`-----------------------`
`436`	`478`	`<div align="center"><img src=https://code-thinking.cdn.bcebos.com/pics/01二维码一.jpg width=500> </img></div>`

0 commit comments

Comments

(0)

Navigation Menu

Search code, repositories, users, issues, pull requests...

Provide feedback

Saved searches

Use saved searches to filter your results more quickly

Uh oh!

Commit 42c5fa7

File tree

1 file changed

1 file changed

`‎problems/背包理论基础01背包-1.md`

0 commit comments