Commit 15a2ad1

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`@@ -30,6 +30,7 @@ This is the solutions collection of my LeetCode submissions, most of them are pr`
`30`	`30`	`\|33\|[Search in Rotated Sorted Array](https://leetcode.com/problems/search-in-rotated-sorted-array/) \| [JavaScript](./src/search-in-rotated-sorted-array/res.js)\|Medium\|`
`31`	`31`	`\|34\|[Search for a Range](https://leetcode.com/problems/search-for-a-range/) \| [JavaScript](./src/search-for-a-range/res.js)\|Medium\|`
`32`	`32`	`\|35\|[Search Insert Position](https://leetcode.com/problems/search-insert-position/) \| [JavaScript](./src/search-insert-position/res.js)\|Easy\|`
	`33`	`+\|39\|[Combination Sum](https://leetcode.com/problems/combination-sum/) \| [JavaScript](./src/combination-sum/res.js)\|Medium\|`
`33`	`34`	`\|41\|[First Missing Positive](https://leetcode.com/problems/first-missing-positive/description/) \| [JavaScript](./src/first-missing-positive/res.js)\|Hard\|`
`34`	`35`	`\|42\|[ Trapping Rain Water](https://leetcode.com/problems/trapping-rain-water/description/) \| [JavaScript](./src/trapping-rain-water/res.js)\|Hard\|`
`35`	`36`	`\|43\|[Multiply Strings](https://leetcode.com/problems/multiply-strings/) \| [JavaScript](./src/multiply-strings/res.js)\|Medium\|`

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`@@ -0,0 +1,33 @@`
	`1`	`+/**`
	`2`	`+ * @param {number[]} candidates`
	`3`	`+ * @param {number} target`
	`4`	`+ * @return {number[][]}`
	`5`	`+ */`
	`6`	`+var combinationSum = function(candidates, target) {`
	`7`	`+ candidates.sort((a, b) => b-a);`
	`8`	`+ const res = [];`
	`9`	`+`
	`10`	`+ const calCombs = (candis, resArr, targ) => {`
	`11`	`+ if (!candis.length) return ;`
	`12`	`+ console.log(candis, resArr, targ);`
	`13`	`+ const ele = candis[0];`
	`14`	`+`
	`15`	`+ if (targ === ele) {`
	`16`	`+ res.push([...resArr, ele]);`
	`17`	`+ } else {`
	`18`	`+ calCombs(candis.slice(1), [...resArr], targ);`
	`19`	`+ }`
	`20`	`+`
	`21`	`+ if (targ - ele > 0) {`
	`22`	`+ calCombs(candis, [...resArr, ele], targ-ele);`
	`23`	`+ }`
	`24`	`+ }`
	`25`	`+`
	`26`	`+ calCombs(candidates, [], target);`
	`27`	`+`
	`28`	`+ console.log(res);`
	`29`	`+ return res;`
	`30`	`+};`
	`31`	`+`
	`32`	`+combinationSum([2,3,6,7],`
	`33`	`+ 7);`

Lines changed: 29 additions & 1 deletion

Original file line number	Diff line number	Diff line change
`@@ -47,4 +47,32 @@ let letterCombinations = function(digits) {`
`47`	`47`	`}`
`48`	`48`
`49`	`49`	`return res;`
`50`		`-};`
	`50`	`+};`
	`51`	`+`
	`52`	`+/**`
	`53`	`+ * @param {string} digits`
	`54`	`+ * @return {string[]}`
	`55`	`+ */`
	`56`	`+var letterCombinations_2 = function(digits) {`
	`57`	`+ const mapping = ["", "", "abc", "def", "ghi", "jkl", "mno", "pqrs", "tuv", "wxyz"];`
	`58`	`+ const res = [];`
	`59`	`+ const len = digits.length;`
	`60`	`+ if (len < 1) return [];`
	`61`	`+`
	`62`	`+ const getCombs = (prefix, start, end) => {`
	`63`	`+ const digitMap = mapping[digits[start]];`
	`64`	`+ // console.log(prefix, start, end, digitMap);`
	`65`	`+ if (start === end) {`
	`66`	`+ return digitMap ? digitMap.split('').map(subfix => {`
	`67`	`+ return prefix + subfix;`
	`68`	`+ }) : [prefix];`
	`69`	`+ } else {`
	`70`	`+ const subCombs = digitMap ? digitMap.split('').map(subfix => getCombs(prefix+subfix, start + 1, end)) : [getCombs(prefix, start + 1, end)];`
	`71`	`+ return subCombs.reduce((acc, cur) => {`
	`72`	`+ return acc.concat(cur);`
	`73`	`+ }, []);`
	`74`	`+ }`
	`75`	`+ }`
	`76`	`+`
	`77`	`+ return res.concat(getCombs('', 0, len-1));`
	`78`	`+ };`

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`@@ -20,3 +20,14 @@ var maxSubArray = function(nums) {`
`20`	`20`
`21`	`21`	`return ans;`
`22`	`22`	`};`
	`23`	`+`
	`24`	`+`
	`25`	`+/**`
	`26`	`+ * @param {number[]} nums`
	`27`	`+ * @return {number}`
	`28`	`+ */`
	`29`	`+var maxSubArray = function(nums) {`
	`30`	`+ if (nums.length < 1) return 0;`
	`31`	`+`
	`32`	`+ return getMaxSum`
	`33`	`+};`

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