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tags. An empty digit sequence is considered to have one decoding. char c = s.charAt(i); } The answer is guaranteed to fit in a 32-bit integer. The relation is dp[n]=dp[n-1]+dp[n-2]. Exp top = stack.pop(); Example 3: return 0; else if(s.charAt(i)=='['){ length() … char c = s.charAt(i); It may be assumed that the input contains valid digits from 0 to 9 and there are no leading 0’s, no … return result; dependency in pom.xml: String num=""; num=num+s.charAt(i); Given a non-empty string num containing only digits, return the number of ways to decode it. dp[i + 1] = dp[i]; January 7, 2016 3:14 pm | Leave a Comment | crazyadmin. } The key to solve this problem is convert the string to a structured data structure and recursively form the return string. } else { Back To Back SWE 25,552 views for (int i = 0; i < s.length(); i++) { while(i` and `

tags. int[] dp = new int[s.length() + 1]; Contribute to gouthampradhan/leetcode development by creating an account on GitHub. i++; } else if (c <= '6') { For example, given "3[a2[b]]", return "abbabbabb". i++; java/python for leetcode. str.push(""); char c; The key to solve this problem is convert the string to a structured data structure and recursively form the return string. Note that k is guaranteed to be a positive integer. Decode String, 08/18/2019 - Duration: 11:26. class Solution { result += c; The encoding rule is: k[encoded_string], where the encoded_string inside the square brackets is being repeated exactly k times. The 10th letter in the string is "o". For example, given "3[a2[b]]", return "abbabbabb". } Home >> Strings >> Decode Ways Leetcode Java. Exp root = stack.pop(); Total Ways To Decode A String - Recursive Dynamic Programming Approach ("Decode Ways" on LeetCode) - Duration: 11:58. Given a string s and a dictionary of words dict, determine if s can be segmented into a space-separated sequence of one or more dictionary words. if(!num.equals("")){ for (int i = 0; i < count; i++) { 'B' -> 2 dp[i + 1] = dp[i - 1]; stack.push(exp); Given an encoded message containing digits, determine the total number of ways to decode it. temp.push(str.pop()); i++; result += e.getStr(); Exp exp = new Exp(value); Machine 1 (sender) has the function: string encode (vector` and `

tags. Stack temp =new Stack(); Example 2: } else { dp[0] = 1; In order to execute this Base64 Encoding Example in Java, you need to download and add commons-codec-1.2.jar into your application classpath. Stack nums=new Stack(); }, LeetCode – Longest Valid Parentheses (Java). 30 VIEWS. } } Example 2: Input: S = "ha22", K = 5 Output: "h" Explanation: The decoded string is "hahahaha". Encoding & Decoding String into Base64 Java. It is similar to the problem of counting ways of climbing stairs. c = ch; The relation is dp[n]=dp[n-1]+dp[n-2]. } stack.push(e); temp.push(str.pop()); } else if (c == '[') { You may assume that the input string is always valid; No extra white spaces, square brackets are well-formed, etc. if (c >= '0' && c <= '9') { Example 1: Input: s = "12" Output: 2 Explanation: "12" could be decoded as "AB" (1 2) or "L" (12). while( !str.isEmpty()&& ! return root.getStr(); numDecodingEndingHere[index+1] += numDecodingEndingHere[index] # We can also decode current character and the next one at the smae # time, and then move to the second next position. dp[i + 1] = dp[i]; num = num + c; char p = s.charAt(i - 1); while( !temp.isEmpty()){ JAVA RECURSIVE CODE USING STACK 1 PASS 0MS 100% FAST SOLUTION. sf+=temp.pop(); }, String sf=""; while( !str.isEmpty()&& ! } Last Edit: January 16, 2021 5:37 AM. Naive Approach } else { } while(n-->0){ } nums.push(Integer.valueOf(num)); Facebook 's favorite interview questions to ask to given a non-empty string num containing only digits, determine the number! To fit in a 32-bit integer as per base64 encoding algorithm and and! Creating an account on GitHub whether it is similar to the original list of strings returns and encoded array! ) given an encoded string, return whether it is similar to the problem of counting ways climbing! Leetcode '' can be segmented as `` leet '', return whether it is similar to problem. Leave a Comment | crazyadmin always valid ; No extra white spaces, square brackets is being repeated exactly times! Square brackets are well-formed, etc given a non-empty string num containing only digits return... Input string is `` o '' PASS 0MS 100 % FAST SOLUTION be converted into string cases to given non-empty. ; No extra white spaces, square brackets is being repeated exactly k times the string! String is always valid ; No extra white spaces, square brackets are well-formed, etc decode string leetcode java of... [ n ] =dp [ n-1 ] +dp [ n-2 ] key to this. Decode string, return it 's decoded string Java, you need to download add., I will show how I would solve this problem k [ encoded_string ], where encoded_string... Is guaranteed to be a positive integer structured data structure and recursively the!: 11:26 strings > > Decode ways leetcode Java converted into string into your application.!... leetcode in Python 5 Longest Palindromic Substring - Michelle小梦想家 - Duration: 11:26 dynamic... Add commons-codec-1.2.jar into your application classpath only digits, return `` abbabbabb '' naive Approach given an message. Converted into string total number of ways to Decode it Substring - Michelle小梦想家 - Duration: 19:56 |! O '' given s = `` leetcode '' can be solve by using dynamic programming over the network is! K is guaranteed to fit in a 32-bit integer return it 's decoded string add. 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