[LeetCode 1530] Number of Good Leaf Nodes Pairs
Given the root of a binary tree and an integer distance. A pair of two different leaf nodes of a binary tree is said to be good if the length ...
原文：[LeetCode] 1512. Number of Good Pairs
Given an array of integersnums. A pair i,j is calledgoodifnums i nums j andi lt j. Return the number ofgoodpairs. Example : Example : Example : Constraints: lt nums.length lt lt nums i lt 題意是給一個數組，求的是 ...
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