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RSS订阅原创 Day59: [PAT甲级] 1083 List Grades (25分)
Day59: [PAT甲级] 1083 List Grades (25分)题源：来自PAT真题库：https://pintia.cn/problem-sets/994805342720868352/problems/994805383929905152代码：dirty code凑合看吧#include<iostream>#include<string>#i...
2020-01-28 20:34:32
158
原创 Day58: [PAT甲级] 1029 Median (25分)
Day58: [PAT甲级] 1029 Median (25分)题源：来自PAT真题库：https://pintia.cn/problem-sets/994805342720868352/problems/994805466364755968代码：dirty code凑合看吧#include<iostream>#include<string>#includ...
2020-01-28 17:41:08
119
原创 Day57: [PAT甲级] 1030 Travel Plan (30分)
Day57: [PAT甲级] 1030 Travel Plan (30分)（双权Dij）题源：来自PAT真题库：https://pintia.cn/problem-sets/994805342720868352/problems/994805464397627392代码：dirty code凑合看吧#include<iostream>#include<string...
2020-01-27 22:38:45
1578
原创 Day56: [PAT甲级] 1035 Password (20分)
Day56: [PAT甲级] 1035 Password (20分)题源：来自PAT真题库：https://pintia.cn/problem-sets/994805342720868352/problems/994805454989803520代码：dirty code凑合看吧#include<iostream>#include<string>#incl...
2020-01-25 22:48:30
106
原创 Day55: [PAT甲级] 1036 Boys vs Girls (25分)
Day55: [PAT甲级] 1036 Boys vs Girls (25分)题源：来自PAT真题库：https://pintia.cn/problem-sets/994805342720868352/problems/994805453203030016代码：dirty code凑合看吧#include<iostream>#include<string>...
2020-01-25 22:46:20
86
原创 Day54: [PAT甲级] 1037 Magic Coupon (25分)
Day54: [PAT甲级] 1037 Magic Coupon (25分)题源：来自PAT真题库：https://pintia.cn/problem-sets/994805342720868352/problems/994805451374313472代码：dirty code凑合看吧#include<iostream>#include<string>#...
2020-01-25 22:44:08
90
原创 Day53: [PAT甲级] 1010 Radix (25分)
Day53: [PAT甲级] 1010 Radix (25分)题源：来自PAT真题库：https://pintia.cn/problem-sets/994805342720868352/problems/994805507225665536代码：dirty code凑合看吧#include<iostream>#include<string>#include...
2020-01-23 22:53:51
89
原创 Day52: [PAT甲级] 1019 General Palindromic Number (20分)
Day52: [PAT甲级] 1019 General Palindromic Number (20分)题源：来自PAT真题库：https://pintia.cn/problem-sets/994805342720868352/problems/994805487143337984代码：dirty code凑合看吧#include<iostream>#include&l...
2020-01-23 20:17:53
131
原创 Day51: [PAT甲级] 1014 Waiting in Line (30分)
Day51: [PAT甲级] 1014 Waiting in Line (30分)题源：来自PAT真题库：https://pintia.cn/problem-sets/994805342720868352/problems/994805498207911936代码：dirty code凑合看吧#include<iostream>#include<string>...
2020-01-22 21:50:50
81
原创 Day50: [PAT甲级] 1025 PAT Ranking (25分)
Day50: [PAT甲级] 1025 PAT Ranking (25分)题源：来自PAT真题库：https://pintia.cn/problem-sets/994805342720868352/problems/994805474338127872代码：dirty code凑合看吧#include<iostream>#include<string>#i...
2020-01-21 21:58:06
719
原创 Day49: [PAT甲级] 1024 Palindromic Number (25分)
Day49: [PAT甲级] 1024 Palindromic Number (25分)题源：来自PAT真题库：https://pintia.cn/problem-sets/994805342720868352/problems/994805476473028608代码：dirty code凑合看吧#include<iostream>#include<string...
2020-01-21 00:03:39
111
原创 Day48: [PAT甲级] 1023 Have Fun with Numbers (20分)
Day48: [PAT甲级] 1023 Have Fun with Numbers (20分)题源：来自PAT真题库：https://pintia.cn/problem-sets/994805342720868352/problems/994805478658260992代码：dirty code凑合看吧#include<iostream>#include<str...
2020-01-19 22:26:45
83
原创 Day47: [PAT甲级] 1022 Digital Library (30分)
Day47: [PAT甲级] 1022 Digital Library (30分)题源：来自PAT真题库：https://pintia.cn/problem-sets/994805342720868352/problems/994805480801550336代码：dirty code凑合看吧#include<iostream>#include<string>...
2020-01-17 22:47:37
94
原创 Day46: [PAT甲级] 1021 Deepest Root (25分)
Day46: [PAT甲级] 1021 Deepest Root (25分)题源：来自PAT真题库：https://pintia.cn/problem-sets/994805342720868352/problems/994805482919673856代码：dirty code凑合看吧#include<iostream>#include<string>#...
2020-01-14 17:05:36
100
原创 Day45: [PAT甲级] 1020 Tree Traversals (25分)
Day45: [PAT甲级] 1020 Tree Traversals (25分)题源：来自PAT甲级题库：https://pintia.cn/problem-sets/994805342720868352/problems/994805485033603072代码：dirty code凑合看吧思路就是通过前序遍历和中序遍历直接把树构造好，然后层序遍历。#include<io...
2020-01-12 23:30:26
91
原创 Day44: [PAT甲级] 1017 Queueing at Bank (25分)
Day44: [PAT甲级] 1017 Queueing at Bank (25分)题源：来自PAT甲级题库：https://pintia.cn/problem-sets/994805342720868352/problems/994805491530579968代码：dirty code凑合看吧#include<iostream>#include<string&...
2020-01-12 17:43:29
119
原创 Day43: [PAT甲级] 1016 Phone Bills (25分)
Day43: [PAT甲级] 1016 Phone Bills (25分)题源：来自PAT甲级题库：https://pintia.cn/problem-sets/994805342720868352/problems/994805493648703488代码：dirty code凑合看吧因为把单词total写成了toltal，导致我折腾了一个小时不知道哪里错（笑哭）#include...
2020-01-11 14:21:39
129
原创 Day42: [PAT甲级] 1015 Reversible Primes (20分)
Day42: [PAT甲级] 1015 Reversible Primes (20分)题源：来自PAT甲级题库：https://pintia.cn/problem-sets/994805342720868352/problems/994805495863296000代码：dirty code凑合看吧三种函数要熟练：其他进制转10进制；10进制转其他进制；判断素数#include&l...
2020-01-09 19:35:53
84
原创 Day41: [PAT甲级] 1013 Battle Over Cities (25分)
Day41: [PAT甲级] 1013 Battle Over Cities (25分)题源：来自PAT真题库：https://pintia.cn/problem-sets/994805342720868352/problems/994805500414115840代码：dirty code凑合看吧ps.还有一种并查集的思路。但是要注意路径压缩!pps.这道题我最先用邻接矩阵+BF...
2020-01-04 16:50:16
78
原创 Day39: [蓝桥杯真题] 合根植物
Day39: [蓝桥杯真题] 合根植物题源：来自蓝桥杯题库：http://lx.lanqiao.cn/problemsets.page代码：dirty code凑合看吧#include<iostream>#include<string>#include<algorithm>#include<vector>using namesp...
2020-01-01 16:50:52
90
原创 Day38: [LeetCode中等] 114. 二叉树展开为链表
Day38: [LeetCode中等] 114. 二叉树展开为链表题源：来自leetcode题库：https://leetcode-cn.com/problems/flatten-binary-tree-to-linked-list/代码：dirty code凑合看吧/** * Definition for a binary tree node. * struct TreeNode...
2019-12-29 21:56:49
110
原创 Day38: [蓝桥杯真题] 小计算器
Day38: [蓝桥杯真题] 小计算器题源：来自蓝桥杯题库：http://lx.lanqiao.cn/problemsets.page代码：dirty code凑合看吧#include<iostream>#include<string>#include<algorithm>#include<functional>using na...
2019-12-24 21:20:32
164
原创 Day37_ [LeetCode简单] 113. 路径总和 II
Day37: [LeetCode简单] 113. 路径总和 II题源：来自leetcode题库：https://leetcode-cn.com/problems/path-sum-ii/代码：dirty code凑合看吧/** * Definition for a binary tree node. * struct TreeNode { * int val; * ...
2019-12-22 21:26:20
99
原创 Day36: [LeetCode简单] 112. 路径总和
Day36: [LeetCode简单] 112. 路径总和题源：来自leetcode题库：https://leetcode-cn.com/problems/path-sum/代码：dirty code凑合看吧/** * Definition for a binary tree node. * struct TreeNode { * int val; * Tree...
2019-12-20 21:41:36
127
原创 Day35: [LeetCode简单] 108. 将有序数组转换为二叉搜索树
Day35: [LeetCode简单] 108. 将有序数组转换为二叉搜索树题源：来自leetcode题库：https://leetcode-cn.com/problems/convert-sorted-array-to-binary-search-tree/代码：dirty code凑合看吧/** * Definition for a binary tree node. * st...
2019-12-17 22:48:21
82
原创 Day34: [LeetCode简单] 110. 平衡二叉树
Day34: [LeetCode简单] 110. 平衡二叉树题源：来自leetcode题库：https://leetcode-cn.com/problems/balanced-binary-tree/代码：dirty code凑合看吧/** * Definition for a binary tree node. * struct TreeNode { * int val...
2019-12-17 22:45:00
83
原创 Day33: [LeetCode中等] 106. 从中序与后序遍历序列构造二叉树
Day33: [LeetCode中等] 106. 从中序与后序遍历序列构造二叉树题源：来自leetcode题库：https://leetcode-cn.com/problems/construct-binary-tree-from-preorder-and-inorder-traversal/代码：dirty code凑合看吧/** * Definition for a binary...
2019-12-16 21:53:07
71
原创 Day32: [LeetCode中等] 105. 从前序与中序遍历序列构造二叉树
Day32: [LeetCode中等] 105. 从前序与中序遍历序列构造二叉树题源：来自leetcode题库：https://leetcode-cn.com/problems/construct-binary-tree-from-preorder-and-inorder-traversal/代码：dirty code凑合看吧/** * Definition for a binary...
2019-12-16 21:52:45
72
原创 Day31: [LeetCode简单] 101. 对称二叉树
Day31: [LeetCode简单] 101. 对称二叉树题源：来自leetcode题库：https://leetcode-cn.com/problems/symmetric-tree/代码：dirty code凑合看吧/** * Definition for a binary tree node. * struct TreeNode { * int val; * ...
2019-12-16 21:52:32
83
原创 Day30: [LeetCode中等] 98. 验证二叉搜索树
Day30: [LeetCode中等] 98. 验证二叉搜索树题源：来自leetcode题库：https://leetcode-cn.com/problems/validate-binary-search-tree/代码：dirty code凑合看吧/** * Definition for a binary tree node. * struct TreeNode { * ...
2019-12-12 16:43:26
71
原创 Day29: [LeetCode中等] 96. 不同的二叉搜索树
Day29: [LeetCode中等] 96. 不同的二叉搜索树题源：来自leetcode题库：https://leetcode-cn.com/problems/unique-binary-search-trees/代码：dirty code凑合看吧class Solution {public: int a[9999999]={0}; int f(int n){ ...
2019-12-11 21:50:29
63
原创 Day28: [LeetCode中等] 1171. 从链表中删去总和值为零的连续节点
Day28: [LeetCode中等] 1171. 从链表中删去总和值为零的连续节点题源：来自leetcode题库：https://leetcode-cn.com/problems/remove-zero-sum-consecutive-nodes-from-linked-list/思路：遍历链表，算出前置和，依次放进set里，然后遇到相同的的话，就会知道，这两个相同的前置和之间的值的总...
2019-12-09 20:38:34
202
原创 Day27: [LeetCode中等] 3. 无重复字符的最长子串
Day27: [LeetCode中等] 3. 无重复字符的最长子串题源：来自leetcode题库：https://leetcode-cn.com/problems/longest-substring-without-repeating-characters/### 思路：这题我用的方法有点小笨，首先设置左右下标，分别指向最长无重复字串的两端，遍历字符串，依次放进set里，然后遇到相同的就...
2019-12-09 20:38:16
80
原创 Day26: [LeetCode中等] 725. 分隔链表
Day26: [LeetCode中等] 725. 分隔链表题源：来自leetcode题库：https://leetcode-cn.com/problems/split-linked-list-in-parts/思路：这道题代码很简单，思路上需要注意的是：怎么确定当前要分的vector的长度。如果你要是简单的用除法就会出问题，比如8个值分为三份，应该分为3，3，2。但是8/3=2，加上余...
2019-12-07 21:09:05
80
原创 Day25: [LeetCode中等] 817. 链表组件
Day25: [LeetCode中等] 817. 链表组件题源：来自leetcode题库：https://leetcode-cn.com/problems/linked-list-components/思路：就是先把vector里的整数都放在set里，然后遍历链表，一旦有组件中的值，就计数加一，然后把组件邻近值越过。代码：dirty code凑合看吧/** * Definiti...
2019-12-07 21:08:47
101
原创 Day24: [LeetCode中等] 1019. 链表中的下一个更大节点
Day24: [LeetCode中等] 1019. 链表中的下一个更大节点题源：来自leetcode题库：https://leetcode-cn.com/problems/next-greater-node-in-linked-list/思路：我是先把链表转存在数组中，然后逆序遍历，用数组xiabiao来储存下一个更大值的数组下标，若没有就是-1。逆序遍历的时候，比较和下一个的值的大小...
2019-12-07 21:08:25
58
原创 Day23: [LeetCode中等] 36. 有效的数独
Day23: [LeetCode中等] 36. 有效的数独题源：来自leetcode题库：https://leetcode-cn.com/problems/valid-sudoku/思路：我刚开始看到这题目的想法是：遍历三次二维数组，然后对应三个条件。但是后来发现遍历一次就可以了（其实和遍历三次的时间复杂度是一样的，毕竟是加性的嘛，但是效率肯定高很多），遍历的同时，把值记录在三个二维数...
2019-12-04 17:45:34
76
原创 Day22: [LeetCode中等] 31.下一个排列
Day22: [LeetCode中等] 31.下一个排列题源：来自leetcode题库：https://leetcode-cn.com/problems/next-permutation/思路：很有意思的一道题，代码简单，难的是思维的过程。想知道的去看题解吧，懒得说了（哈哈，我这博客好随意）。代码：dirty code凑合看吧class Solution {public: ...
2019-12-04 17:45:10
62
原创 Day21: [LeetCode中等] 430. 扁平化多级双向链表
Day21: [LeetCode中等] 430. 扁平化多级双向链表题源：来自leetcode题库：https://leetcode-cn.com/problems/flatten-a-multilevel-doubly-linked-list/思路：我用的是递归的思想，这道题很适合递归。代码：dirty code凑合看吧/*// Definition for a Node....
2019-12-04 17:44:02
60
原创 Day19: [LeetCode中等] 328. 奇偶链表
Day20: [LeetCode中等] 328. 奇偶链表题源：来自leetcode题库：https://leetcode-cn.com/problems/odd-even-linked-list/思路：就是间隔性的把链表拆成两个，然后合并一下。代码：dirty code凑合看吧/** * Definition for singly-linked list. * struct...
2019-11-30 21:11:22
90
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