原创 LeetCode329. Longest Increasing Path in a Matrix
題目： Given an integer matrix, find the length of the longest increasing path. From each cell, you can either move to
2020-02-21 03:41:38
原创 HDOJ 1402. A * B Problem Plus (FFT快速傅里葉變換)
Problem Description Calculate A * B. Input Each line will contain two integers A and B. Process to end of file.
2020-02-21 03:41:38
原创 LeetCode 327. Count of Range Sum
題目：Given an integer array nums, return the number of range sums that lie in [lower, upper] inclusive. Range sum S(
2020-02-21 03:41:38
原创 LeetCode 11. Container With Most Water
題目：Given n non-negative integers a1, a2, …, an, where each represents a point at coordinate (i, ai). n vertical lin
2020-02-21 03:41:38
原创 LeetCode144. Binary Tree Preorder Traversal
題目 Given a binary tree, return the preorder traversal of its nodes’ values. For example: Given binary tree {1,#,2,
2020-02-21 03:41:38
原创 LeetCode 15. 3Sum
題目：Given an array S of n integers, are there elements a, b, c in S such that a + b + c = 0? Find all unique triplet
2020-02-21 03:41:38
原创 LeetCode403. Frog Jump
題目： A frog is crossing a river. The river is divided into x units and at each unit there may or may not exist a stone
2020-02-21 03:41:38
原创 LeetCode 199. Binary Tree Right Side View
題目：Given a binary tree, imagine yourself standing on the right side of it, return the values of the nodes you can s
2020-02-21 03:41:38
原创 LeetCode25. Reverse Nodes in k-Group
題目：對一個鏈表的長度爲k的塊進行reverse，要求常數空間。 Given a linked list, reverse the nodes of a linked list k at a time and return its m
2020-02-21 03:41:38
原创 LeetCode 5 Longest Palindromic Substring
題目：Given a string S, find the longest palindromic substring in S. You may assume that the maximum length of S is 10
2020-02-21 03:41:38
原创 LeetCode 45. Jump Game II
題目 Given an array of non-negative integers, you are initially positioned at the first index of the array. Each elem
2020-02-21 03:41:36
原创 LeetCode413. Arithmetic Slices
題目： A sequence of number is called arithmetic if it consists of at least three elements and if the difference between
2020-02-21 03:41:36
原创 刷題總結
POJ 3253 Huffman樹 錯誤：結果超出了int的範圍，應該用long long；而且printf("%lld",ans)，注意是lld POJ 2686 Traveling by Stagecoach（DAG，狀壓dp）
2018-08-27 05:39:28
原创 Codeforces EC #36 C. Permute Digits
看上去不難，但一直在WA… 開始的算法是：從左往右構造結果res[i]，在a沒被選擇的數字中，選擇<=b[i]的最大值，如果選擇的值< b[i]，之後每一步都選擇剩餘數字中最大的。 問題在於：有可能選擇了某個數字，導致之後不可能再構
2018-08-27 05:39:28
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