9月 7 2017 Online Judge►LeetCode [LeetCode] 515 - Find Largest Value in Each Tree Row 題意找出樹中每一層最大的元素。 Read More
9月 7 2017 Online Judge►LeetCode [LeetCode] 513 - Find Bottom Left Tree Value 題意找出樹中最下層且最左邊的元素。 Read More
9月 7 2017 Online Judge►LeetCode [LeetCode] 508 - Most Frequent Subtree Sum 題意找出所有子樹和頻率最高的值。 Read More
9月 7 2017 Online Judge►LeetCode [LeetCode] 451 - Sort Characters By Frequency 題意改變輸入的字串為出現頻率高至低，若頻率相同則照字典排序。 Read More
9月 7 2017 Online Judge►LeetCode [LeetCode] 442 - Find All Duplicates in an Array 題意一陣列符合 1 ≤ a[i] ≤ n 且元素皆為一個或兩個，找出所有含有兩個的元素。 Read More
9月 7 2017 Online Judge►LeetCode [LeetCode] 287 - Find the Duplicate Number 題意一個 n+1 長度的陣列中含有元素 1~n ，找出重複的那個元素。 Read More