44 lines
960 B
Markdown
44 lines
960 B
Markdown
---
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id: 5900f3841000cf542c50fe97
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title: 问题24：字典排列
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challengeType: 5
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videoUrl: ''
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---
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# --description--
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置换是对象的有序排列。例如，3124是数字1,2,3和4的一种可能的排列。如果所有排列都以数字或字母顺序列出，我们称之为词典顺序。字典排列0,1和2是：
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012 021 102 120 201 210
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数字0,1,2,3,4,5,6,7,8和9的第`n`个词典排列是什么？
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# --hints--
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`lexicographicPermutations(699999)`应该返回1938246570。
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```js
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assert(lexicographicPermutations(699999) == 1938246570);
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```
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`lexicographicPermutations(899999)`应该返回2536987410。
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```js
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assert(lexicographicPermutations(899999) == 2536987410);
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```
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`lexicographicPermutations(900000)`应该返回2537014689。
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```js
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assert(lexicographicPermutations(900000) == 2537014689);
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```
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`lexicographicPermutations(999999)`应该返回2783915460。
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```js
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assert(lexicographicPermutations(999999) == 2783915460);
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```
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# --solutions--
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