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188. Best Time to Buy and Sell Stock IV 188. Best Time to Buy and Sell Stock IV Total Accepted: 31463 Total Submissions: 135777 Difficulty: Hard Say y 阅读全文
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123. Best Time to Buy and Sell Stock III 123. Best Time to Buy and Sell Stock III Total Accepted: 64481 Total Submissions: 236301 Difficulty: Hard Say 阅读全文
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347. Top K Frequent Elements 347. Top K Frequent Elements Total Accepted: 26456 Total Submissions: 60329 Difficulty: Medium Given a non-empty array of 阅读全文
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224. Basic Calculator 224. Basic Calculator Total Accepted: 32728 Total Submissions: 139195 Difficulty: Hard Implement a basic calculator to evaluate 阅读全文
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241. Different Ways to Add Parentheses 241. Different Ways to Add Parentheses Total Accepted: 27446 Total Submissions: 72350 Difficulty: Medium Given 阅读全文
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95. Unique Binary Search Trees II 95. Unique Binary Search Trees II Total Accepted: 61324 Total Submissions: 207585 Difficulty: Medium Given an intege 阅读全文
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96. Unique Binary Search Trees 96. Unique Binary Search Trees Total Accepted: 91481 Total Submissions: 238129 Difficulty: Medium Given n, how many str 阅读全文
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47. Permutations II 47. Permutations II Total Accepted: 80610 Total Submissions: 277081 Difficulty: Medium Given a collection of numbers that might co 阅读全文
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46. Permutations 46. Permutations Total Accepted: 112369 Total Submissions: 300018 Difficulty: Medium Given a collection of distinct numbers, return a 阅读全文
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357. Count Numbers with Unique Digits 357. Count Numbers with Unique Digits Total Accepted: 10844 Total Submissions: 25103 Difficulty: Medium Given a 阅读全文