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leetcode-problemset/leetcode-cn/originData/rMeRt2.json

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{
"data": {
"question": {
"questionId": "1000484",
"questionFrontendId": "LCP 69",
"categoryTitle": "Algorithms",
"boundTopicId": 1874939,
"title": "Hello LeetCode!",
"titleSlug": "rMeRt2",
"content": "English description is not available for the problem. Please switch to Chinese.",
"translatedTitle": "Hello LeetCode!",
"translatedContent": "力扣嘉年华同样准备了纪念品展位,参观者只需要集齐 `helloleetcode` 的 `13` 张字母卡片即可获得力扣纪念章。\n\n在展位上有一些由字母卡片拼成的单词`words[i][j]` 表示第 `i` 个单词的第 `j` 个字母。\n\n你可以从这些单词中取出一些卡片但每次拿取卡片都需要消耗游戏代币规则如下\n\n- 从一个单词中取一个字母所需要的代币数量,为该字母左边和右边字母数量之积\n\n- 可以从一个单词中多次取字母,每个字母仅可被取一次\n\n> 例如:从 `example` 中取出字母 `a`,需要消耗代币 `2*4=8`,字母取出后单词变为 `exmple`\n再从中取出字母 `m`,需要消耗代币 `2*3=6`,字母取出后单词变为 `exple`\n\n请返回取得 `helloleetcode` 这些字母需要消耗代币的 **最少** 数量。如果无法取得,返回 `-1`。\n\n**注意:**\n- 取出字母的顺序没有要求\n- 取出的所有字母恰好可以拼成 `helloleetcode` \n\n**示例 1**\n>输入:`words = [\"hold\",\"engineer\",\"cost\",\"level\"]`\n>\n>输出:`5`\n>\n>解释:最优方法为:\n>从 `hold` 依次取出 `h`、`o`、`l`、`d` 代价均为 `0`\n>从 `engineer` 依次取出第 `1` 个 `e` 与最后一个 `e` 代价为 `0` 和 `5*1=5`\n>从 `cost` 取出 `c`、`o`、`t` 代价均为 `0`\n>从 `level` 依次取出 `l`、`l`、`e`、`e` 代价均为 `0`\n>所有字母恰好可以拼成 `helloleetcode`,因此最小的代价为 `5`\n\n**示例 2**\n>输入:`words = [\"hello\",\"leetcode\"]`\n>\n>输出:`0`\n\n**提示:**\n+ `n == words.length`\n+ `m == words[i].length`\n+ `1 <= n <= 24`\n+ `1 <= m <= 8`\n+ `words[i][j]` 仅为小写字母",
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