{ "data": { "question": { "questionId": "1976", "questionFrontendId": "1849", "categoryTitle": "Algorithms", "boundTopicId": 752468, "title": "Splitting a String Into Descending Consecutive Values", "titleSlug": "splitting-a-string-into-descending-consecutive-values", "content": "
You are given a string s
that consists of only digits.
Check if we can split s
into two or more non-empty substrings such that the numerical values of the substrings are in descending order and the difference between numerical values of every two adjacent substrings is equal to 1
.
s = "0090089"
can be split into ["0090", "089"]
with numerical values [90,89]
. The values are in descending order and adjacent values differ by 1
, so this way is valid.s = "001"
can be split into ["0", "01"]
, ["00", "1"]
, or ["0", "0", "1"]
. However all the ways are invalid because they have numerical values [0,1]
, [0,1]
, and [0,0,1]
respectively, all of which are not in descending order.Return true
if it is possible to split s
as described above, or false
otherwise.
A substring is a contiguous sequence of characters in a string.
\n\n\n
Example 1:
\n\n\nInput: s = "1234"\nOutput: false\nExplanation: There is no valid way to split s.\n\n\n
Example 2:
\n\n\nInput: s = "050043"\nOutput: true\nExplanation: s can be split into ["05", "004", "3"] with numerical values [5,4,3].\nThe values are in descending order with adjacent values differing by 1.\n\n\n
Example 3:
\n\n\nInput: s = "9080701"\nOutput: false\nExplanation: There is no valid way to split s.\n\n\n
\n
Constraints:
\n\n1 <= s.length <= 20
s
only consists of digits.给你一个仅由数字组成的字符串 s
。
请你判断能否将 s
拆分成两个或者多个 非空子字符串 ,使子字符串的 数值 按 降序 排列,且每两个 相邻子字符串 的数值之 差 等于 1
。
s = \"0090089\"
可以拆分成 [\"0090\", \"089\"]
,数值为 [90,89]
。这些数值满足按降序排列,且相邻值相差 1
,这种拆分方法可行。s = \"001\"
可以拆分成 [\"0\", \"01\"]
、[\"00\", \"1\"]
或 [\"0\", \"0\", \"1\"]
。然而,所有这些拆分方法都不可行,因为对应数值分别是 [0,1]
、[0,1]
和 [0,0,1]
,都不满足按降序排列的要求。如果可以按要求拆分 s
,返回 true
;否则,返回 false
。
子字符串 是字符串中的一个连续字符序列。
\n\n\n\n
示例 1:
\n\n\n输入:s = \"1234\"\n输出:false\n解释:不存在拆分 s 的可行方法。\n\n\n
示例 2:
\n\n\n输入:s = \"050043\"\n输出:true\n解释:s 可以拆分为 [\"05\", \"004\", \"3\"] ,对应数值为 [5,4,3] 。\n满足按降序排列,且相邻值相差 1
。\n
\n\n示例 3:
\n\n\n输入:s = \"9080701\"\n输出:false\n解释:不存在拆分 s 的可行方法。\n\n\n
示例 4:
\n\n\n输入:s = \"10009998\"\n输出:true\n解释:s 可以拆分为 [\"100\", \"099\", \"98\"] ,对应数值为 [100,99,98] 。\n满足按降序排列,且相邻值相差 1
。
\n\n\n\n
提示:
\n\n1 <= s.length <= 20
s
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out-of-bounds<\\/code>\\u548c
use-after-free<\\/code>\\u9519\\u8bef\\u3002<\\/p>\\r\\n\\r\\n
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out-of-bounds<\\/code>\\u548c
use-after-free<\\/code>\\u9519\\u8bef\\u3002<\\/p>\\r\\n\\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<\\/pre>\\r\\n<\\/p>\\r\\n\\r\\n
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\\r\\nvoid delete_user(struct hash_entry *user) {\\r\\n HASH_DEL(users, user); \\r\\n}\\r\\n<\\/pre>\\r\\n<\\/p>\"],\"csharp\":[\"C#\",\"
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Node.js 16.13.2<\\/code><\\/p>\\r\\n\\r\\n
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Swift 5.5.2<\\/code><\\/p>\\r\\n\\r\\n
Go 1.17<\\/code><\\/p>\\r\\n\\r\\n
Python 3.10<\\/code><\\/p>\\r\\n\\r\\n
Scala 2.13<\\/code><\\/p>\"],\"kotlin\":[\"Kotlin\",\"
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PHP 8.1<\\/code>.<\\/p>\\r\\n\\r\\n