{ "data": { "question": { "questionId": "2184", "questionFrontendId": "2060", "boundTopicId": null, "title": "Check if an Original String Exists Given Two Encoded Strings", "titleSlug": "check-if-an-original-string-exists-given-two-encoded-strings", "content": "
An original string, consisting of lowercase English letters, can be encoded by the following steps:
\n\nFor example, one way to encode an original string "abcdefghijklmnop"
might be:
["ab", "cdefghijklmn", "o", "p"]
.["ab", "12", "1", "p"]
."ab121p"
.Given two encoded strings s1
and s2
, consisting of lowercase English letters and digits 1-9
(inclusive), return true
if there exists an original string that could be encoded as both s1
and s2
. Otherwise, return false
.
Note: The test cases are generated such that the number of consecutive digits in s1
and s2
does not exceed 3
.
\n
Example 1:
\n\n\nInput: s1 = "internationalization", s2 = "i18n"\nOutput: true\nExplanation: It is possible that "internationalization" was the original string.\n- "internationalization" \n -> Split: ["internationalization"]\n -> Do not replace any element\n -> Concatenate: "internationalization", which is s1.\n- "internationalization"\n -> Split: ["i", "nternationalizatio", "n"]\n -> Replace: ["i", "18", "n"]\n -> Concatenate: "i18n", which is s2\n\n\n
Example 2:
\n\n\nInput: s1 = "l123e", s2 = "44"\nOutput: true\nExplanation: It is possible that "leetcode" was the original string.\n- "leetcode" \n -> Split: ["l", "e", "et", "cod", "e"]\n -> Replace: ["l", "1", "2", "3", "e"]\n -> Concatenate: "l123e", which is s1.\n- "leetcode" \n -> Split: ["leet", "code"]\n -> Replace: ["4", "4"]\n -> Concatenate: "44", which is s2.\n\n\n
Example 3:
\n\n\nInput: s1 = "a5b", s2 = "c5b"\nOutput: false\nExplanation: It is impossible.\n- The original string encoded as s1 must start with the letter 'a'.\n- The original string encoded as s2 must start with the letter 'c'.\n\n\n
\n
Constraints:
\n\n1 <= s1.length, s2.length <= 40
s1
and s2
consist of digits 1-9
(inclusive), and lowercase English letters only.s1
and s2
does not exceed 3
.Compiled with clang 11
using the latest C++ 20 standard.
Your code is compiled with level two optimization (-O2
). AddressSanitizer is also enabled to help detect out-of-bounds and use-after-free bugs.
Most standard library headers are already included automatically for your convenience.
\"], \"java\": [\"Java\", \"OpenJDK 17
. Java 8 features such as lambda expressions and stream API can be used.
Most standard library headers are already included automatically for your convenience.
\\r\\nIncludes Pair
class from https://docs.oracle.com/javase/8/javafx/api/javafx/util/Pair.html.
Python 2.7.12
.
Most libraries are already imported automatically for your convenience, such as array, bisect, collections. If you need more libraries, you can import it yourself.
\\r\\n\\r\\nFor Map/TreeMap data structure, you may use sortedcontainers library.
\\r\\n\\r\\nNote that Python 2.7 will not be maintained past 2020. For the latest Python, please choose Python3 instead.
\"], \"c\": [\"C\", \"Compiled with gcc 8.2
using the gnu11 standard.
Your code is compiled with level one optimization (-O1
). AddressSanitizer is also enabled to help detect out-of-bounds and use-after-free bugs.
Most standard library headers are already included automatically for your convenience.
\\r\\n\\r\\nFor hash table operations, you may use uthash. \\\"uthash.h\\\" is included by default. Below are some examples:
\\r\\n\\r\\n1. Adding an item to a hash.\\r\\n
\\r\\nstruct hash_entry {\\r\\n int id; /* we'll use this field as the key */\\r\\n char name[10];\\r\\n UT_hash_handle hh; /* makes this structure hashable */\\r\\n};\\r\\n\\r\\nstruct hash_entry *users = NULL;\\r\\n\\r\\nvoid add_user(struct hash_entry *s) {\\r\\n HASH_ADD_INT(users, id, s);\\r\\n}\\r\\n\\r\\n\\r\\n\\r\\n
2. Looking up an item in a hash:\\r\\n
\\r\\nstruct hash_entry *find_user(int user_id) {\\r\\n struct hash_entry *s;\\r\\n HASH_FIND_INT(users, &user_id, s);\\r\\n return s;\\r\\n}\\r\\n\\r\\n\\r\\n\\r\\n
3. Deleting an item in a hash:\\r\\n
\\r\\nvoid delete_user(struct hash_entry *user) {\\r\\n HASH_DEL(users, user); \\r\\n}\\r\\n\\r\\n\"], \"csharp\": [\"C#\", \"\"], \"javascript\": [\"JavaScript\", \"
Node.js 16.13.2
.
Your code is run with --harmony
flag, enabling new ES6 features.
lodash.js library is included by default.
\\r\\n\\r\\nFor Priority Queue / Queue data structures, you may use 5.3.0 version of datastructures-js/priority-queue and 4.2.1 version of datastructures-js/queue.
\"], \"ruby\": [\"Ruby\", \"Ruby 3.1
Some common data structure implementations are provided in the Algorithms module: https://www.rubydoc.info/github/kanwei/algorithms/Algorithms
\"], \"swift\": [\"Swift\", \"Swift 5.5.2
.
Go 1.21
Support https://godoc.org/github.com/emirpasic/gods@v1.18.1 library.
\"], \"python3\": [\"Python3\", \"Python 3.10
.
Most libraries are already imported automatically for your convenience, such as array, bisect, collections. If you need more libraries, you can import it yourself.
\\r\\n\\r\\nFor Map/TreeMap data structure, you may use sortedcontainers library.
\"], \"scala\": [\"Scala\", \"Scala 2.13.7
.
Kotlin 1.9.0
.
Rust 1.58.1
Supports rand v0.6\\u00a0from crates.io
\"], \"php\": [\"PHP\", \"PHP 8.1
.
With bcmath module
\"], \"typescript\": [\"Typescript\", \"TypeScript 5.1.6, Node.js 16.13.2
.
Your code is run with --harmony
flag, enabling new ES2022 features.
lodash.js library is included by default.
\"], \"racket\": [\"Racket\", \"Run with Racket 8.3
.
Dart 2.17.3
\\r\\n\\r\\nYour code will be run directly without compiling
\"]}", "libraryUrl": null, "adminUrl": null, "challengeQuestion": null, "__typename": "QuestionNode" } } }