Commit f7284ab

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solve problem Decode String

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`@@ -310,6 +310,7 @@ All solutions will be accepted!`
`310`	`310`	`\|165\|[Compare Version Numbers](https://leetcode-cn.com/problems/compare-version-numbers/description/)\|[java/py/js](./algorithms/CompareVersionNumbers)\|Medium\|`
`311`	`311`	`\|8\|[String To Integer Atoi](https://leetcode-cn.com/problems/string-to-integer-atoi/description/)\|[java/py/js](./algorithms/StringToIntegerAtoi)\|Medium\|`
`312`	`312`	`\|299\|[Bulls And Cows](https://leetcode-cn.com/problems/bulls-and-cows/description/)\|[java/py/js](./algorithms/BullsAndCows)\|Medium\|`
	`313`	`+\|394\|[Decode String](https://leetcode-cn.com/problems/decode-string/description/)\|[java/py/js](./algorithms/DecodeString)\|Medium\|`
`313`	`314`
`314`	`315`	`# Database`
`315`	`316`	`\|#\|Title\|Solution\|Difficulty\|`

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`@@ -0,0 +1,2 @@`
	`1`	`+# Decode String`
	`2`	`+We can solve this problem by stack`

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`@@ -0,0 +1,31 @@`
	`1`	`+class Solution {`
	`2`	`+ public String decodeString(String s) {`
	`3`	`+ LinkedList<String> stack = new LinkedList<String>();`
	`4`	`+ StringBuilder sb = new StringBuilder();`
	`5`	`+`
	`6`	`+ for (char c : s.toCharArray()) {`
	`7`	`+ if (c == ']') {`
	`8`	`+ StringBuilder strSb = new StringBuilder();`
	`9`	`+ while (stack.size() > 0 && !stack.peek().equals("["))`
	`10`	`+ strSb.insert(0, stack.pop());`
	`11`	`+ stack.pop();`
	`12`	`+`
	`13`	`+ StringBuilder intSb = new StringBuilder();`
	`14`	`+ while (stack.size() > 0 && stack.peek().matches("\\d+"))`
	`15`	`+ intSb.insert(0, stack.pop());`
	`16`	`+`
	`17`	`+ String temp = strSb.toString();`
	`18`	`+ strSb = new StringBuilder();`
	`19`	`+ for (int i = 0; i < Integer.valueOf(intSb.toString()); i++)`
	`20`	`+ strSb.append(temp);`
	`21`	`+ stack.push(strSb.toString());`
	`22`	`+ } else {`
	`23`	`+ stack.push(String.valueOf(c));`
	`24`	`+ }`
	`25`	`+ }`
	`26`	`+`
	`27`	`+ while (stack.size() > 0)`
	`28`	`+ sb.append(stack.pollLast());`
	`29`	`+ return sb.toString();`
	`30`	`+ }`
	`31`	`+}`

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	`1`	`+/**`
	`2`	`+ * @param {string} s`
	`3`	`+ * @return {string}`
	`4`	`+ */`
	`5`	`+var decodeString = function(s) {`
	`6`	`+ let stack = []`
	`7`	`+`
	`8`	`+ s.split('').forEach(c => {`
	`9`	`+ if (c == ']') {`
	`10`	`+ let tempStr = ''`
	`11`	`+ while (stack.length > 0 && stack[stack.length - 1] != '[')`
	`12`	`+ tempStr = stack.pop() + tempStr`
	`13`	`+ stack.pop()`
	`14`	`+`
	`15`	`+ let tempInt = ''`
	`16`	`+ while (stack.length > 0 && /\d+/.test(stack[stack.length - 1]))`
	`17`	`+ tempInt = stack.pop() + tempInt`
	`18`	`+`
	`19`	`+ stack.push(tempStr.repeat(parseInt(tempInt)))`
	`20`	`+ } else`
	`21`	`+ stack.push(c)`
	`22`	`+ })`
	`23`	`+`
	`24`	`+ return stack.join('')`
	`25`	`+};`

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`@@ -0,0 +1,23 @@`
	`1`	`+class Solution(object):`
	`2`	`+ def decodeString(self, s):`
	`3`	`+ """`
	`4`	`+ :type s: str`
	`5`	`+ :rtype: str`
	`6`	`+ """`
	`7`	`+ stack = []`
	`8`	`+ for c in s:`
	`9`	`+ if c == ']':`
	`10`	`+ temp_str = ''`
	`11`	`+ while len(stack) > 0 and stack[-1] != '[':`
	`12`	`+ temp_str = stack.pop() + temp_str`
	`13`	`+ stack.pop()`
	`14`	`+`
	`15`	`+ temp_int = ''`
	`16`	`+ while len(stack) > 0 and stack[-1].isdigit():`
	`17`	`+ temp_int = stack.pop() + temp_int`
	`18`	`+`
	`19`	`+ stack.append(int(temp_int) * temp_str)`
	`20`	`+ else:`
	`21`	`+ stack.append(c)`
	`22`	`+`
	`23`	`+ return ''.join(stack)`

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