各大OJ题目归类
—————————–最优化问题————————————-
———————-动态规划
SOJ1162 I-Keyboard
SOJ2096 Maximum Submatrix
SOJ2111 littleken bg
SOJ2505 The County Fair
SOJ2818 QQ音速
SOJ2469 Exploring Pyramids
SOJ1833 Base Numbers
SOJ2009 Zeros and Ones
SOJ2032 The Lost House
SOJ2289 A decorative fence
SOJ2089 lykoo
SOJ2440 The days in fzk
SOJ2718 Bookshelf
SOJ2722 Treats for the Cows(二维状态，0维决策)
SOJ2726 Deck of Cards
SOJ2729 Space Elevator
SOJ2730 Lazy Cows
SOJ2702 Alanna
SOJ2713 Cut the Sequence
SOJ2768 Bomb
SOJ2779 Find the max (I) (最大M子段和问题)
SOJ2796 Letter Deletion(DP基础题，最长公共子序列问题)
SOJ2800 三角形
SOJ2804 Longest Ordered Subsequence (II)
SOJ2896 Alphacode (动态规划简单题)
SOJ2930 积木城堡
SOJ3037 Painting the balls
SOJ3104 Game(注意大数运算，高精度)
SOJ3264 Evil Game
SOJ3300 Stockholm Coins(背包问题)
SOJ3360 Buying Hay(背包问题)
SOJ3531 Number Pyramids(背包问题)
—————-状态DP
SOJ2089 lykoo
SOJ2819 Ader
SOJ2842 The TSP problem
SOJ3025 Artillery(状态DP)
SOJ3088 windy’s cake VIII
SOJ3259 Counting numbers
SOJ3262 Square Fields(二分+状态DP)
SOJ3371 Mixed Up Cows
————— 最优化之排序
(思考两个元素之间的先后关系，以此得出一个二元比较关系，并验证此关系可传递,反对称，进而排序)
SOJ2509 The Milk Queue
SOJ2547 cards
SOJ2850 Protecting the Flowers
SOJ2957 Setting Problems
SOJ3167 Computer
SOJ3331 Cards(2547加强版)
SOJ3327 Dahema’s Computer(通过此题学会排序)
—————–最优化之必要条件枚举
(思考最优解所具有的性质，得出最优解的一个强必要条件，在此基础上枚举）
SOJ3317 FGJ’s Plane
SOJ3429 Food portion sizes
——————————–贪心—————————————
SOJ1078 BlueEyes’ Schedule
SOJ1203 Pass-Muraille
SOJ1673 Gone Fishing
SOJ2645 Buy One Get One Free
SOJ2701 In a Cycle
SOJ2876 Antimonotonicity(经典模型 O(n)算法)
SOJ3343 Tower
——————————–搜索—————————————
SOJ1626 square
SOJ2061 8 puzzle
SOJ2485 Sudoku
SOJ1045 Sticks
SOJ2736 Fliptile
SOJ2771 Collecting Stones
SOJ2715 Maze Break
SOJ2829 binary strings(双向BFS)
SOJ3330 Windy’s Matrix(BFS)
——————————–DFA—————————————-
—————状态矩阵+DFA：
SOJ1826 Number Sequence
SOJ2552 Number of Tilings
SOJ2919 Matrix Power Series (学习矩阵的快速乘法从此开始)
SOJ2920 Magic Bean
SOJ3021 Quad Tiling
SOJ3046 Odd Loving Bakers
SOJ3176 E-string
SOJ3246 Tiling a Grid With Dominoes
SOJ3323 K-Satisfied Numbers
SOJ3337 Wqb’s Word
—————-DFA+DP
SOJ1112 Repeatless Numbers(DFA+二分)
SOJ2913 Number Substring
SOJ2826 Apocalypse Someday
SOJ3030 DNA Sequence(AC自动机+矩阵二分)
SOJ3128 windy和水星 — 水星数学家 1
SOJ3182 Windy numbers
———————————图论—————————————
——————–最短路+最小生成树+强连通
SOJ2832 Mars city(强连通分支，算法多多)
SOJ2198 Highways
SOJ3427 Dark roads(最小生成树，kruskal：快排+并查集)
SOJ3346 Best Spot（最短路，N^3放心的写）
SOJ3013 tree(树的最大—最小划分问题，二分+贪心，勉强算在图论里面吧。)
SOJ3056 Average distance(树上的DFS)
SOJ2427 Daizi’s path system（最短路）
SOJ1935 Electricity
SOJ2472 Guardian of Decency
SOJ1183 Courses
SOJ2468 Catcus
SOJ2751 Wormholes(SPFA判断负圈回路的存在性)
SOJ1677 How far away(最近公共祖先问题，LCA) ­
SOJ1075 BlueEyes and Apples (II) ­
SOJ2932 道路(最短路)
SOJ3160 Clear And Present Danger
———————二分图的匹配
SOJ1183 Girls and Boys
SOJ1981 Going Home
SOJ2077 Machine Schedule
SOJ2160 Optimal Milking
SOJ2681 平方数 2
SOJ2737 Asteroids
SOJ2806 LED Display
SOJ2958 Weird Fence
SOJ3043 Minimum Cost
SOJ3038 Beloved Sons（简单贪心一下）
SOJ3453 Stock Charts
ZOJ3265 Strange Game
———————————网络流————————————-
———————最大流
POJ 1273 Drainage Ditches
POJ 1274 The Perfect Stall (二分图匹配)
POJ 1698 Alice’s Chance
POJ 1459 Power Network
POJ 2112 Optimal Milking (二分)
POJ 2455 Secret Milking Machine (二分)
POJ 3189 Steady Cow Assignment (枚举)
POJ 1637 Sightseeing tour (混合图欧拉回路)
POJ 3498 March of the Penguins (枚举汇点)
POJ 1087 A Plug for UNIX
POJ 1149 Pigs (构图题)
ZOJ 2760 How Many Shortest Path (边不相交最短路的条数)
POJ 2391 Ombrophobic Bovines (必须拆点，否则有BUG)
WHU 1124 Football Coach (构图题)
SGU 326 Perspective (构图题，类似于 WHU 1124)
UVa 563 Crimewave
UVa 820 Internet Bandwidth
POJ 3281 Dining (构图题)
POJ 3436 ACM Computer Factory
POJ 2289 Jamie’s Contact Groups (二分)
SGU 438 The Glorious Karlutka River =) (按时间拆点)
SGU 242 Student’s Morning (输出一组解)
SGU 185 Two shortest (Dijkstra 预处理，两次增广，必须用邻接阵实现，否则 MLE)
HOJ 2816 Power Line
POJ 2699 The Maximum Number of Strong Kings (枚举+构图)
ZOJ 2332 Gems
JOJ 2453 Candy (构图题)
SOJ3312 Stockholm Knights
SOJ3353 Total Flow
SOJ2414 Leapin’ Lizards
——————–最小割
SOJ3106 Dual Core CPU
SOJ3109 Space flight
SOJ3107 Select
SOJ3185 Black and white
SOJ3254 Rain and Fgj
SOJ3134 windy和水星 — 水星交通
HOJ 2634 How to earn more
ZOJ 2071 Technology Trader (找割边)
HNU 10940 Coconuts
ZOJ 2532 Internship (找关键割边)
POJ 1815 Friendship (字典序最小的点割集)
POJ 3204 Ikki’s Story I – Road Reconstruction (找关键割边)
POJ 3308 Paratroopers
POJ 3084 Panic Room
POJ 3469 Dual Core CPU
ZOJ 2587 Unique Attack (最小割的唯一性判定)
POJ 2125 Destroying The Graph (找割边)
ZOJ 2539 Energy Minimization
TJU 2944 Mussy Paper (最大权闭合子图)
POJ 1966 Cable TV Network (无向图点连通度)
HDU 1565 方格取数(1) (最大点权独立集)
HDU 1569 方格取数(2) (最大点权独立集)
POJ 2987 Firing (最大权闭合子图)
SPOJ 839 Optimal Marks (将异或操作转化为对每一位求最小割)
HOJ 2811 Earthquake Damage (最小点割集)
2008 Beijing Regional Contest Problem A Destroying the bus stations ( BFS 预处理 )
ZOJ 2676 Network Wars (参数搜索)
POJ 3155 Hard Life (参数搜索)
ZOJ 3241 Being a Hero
—————–有上下界
ZOJ 2314 Reactor Cooling (无源汇可行流)
POJ 2396 Budget (有源汇可行流)
SGU 176 Flow Construction (有源汇最小流)
ZOJ 3229 Shoot the Bullet (有源汇最大流)
HDU 3157 Crazy Circuits (有源汇最小流)
—————–最小费用流
HOJ 2715 Matrix3
HOJ 2739 The Chinese Postman Problem
POJ 2175 Evacuation Plan (消一次负圈)
POJ 3422 Kaka’s Matrix Travels (与 Matrix3 类似)
POJ 2516 Minimum Cost (按物品种类多次建图)
POJ 2195 Going Home
BUAA 1032 Destroying a Painting
POJ 2400 Supervisor, Supervisee (输出所有最小权匹配)
POJ 3680 Intervals
HOJ 2543 Stone IV
POJ 2135 Farm Tour
SOJ 3186 Segments
———————————–数据结构———————————
———————线段树
SOJ1862 Choice Pears
SOJ2057 The manager’s worry
SOJ2249 Mayor’s posters
SOJ2436 Picture puzzle game
SOJ2556 Find the Permutation
SOJ2562 The End of Corruption
SOJ2719 Corral the Cows(线段树+二分)
SOJ2740 Balanced Lineup
SOJ2745 零序列
SOJ2776 Matrix Searching
SOJ2808 Thermal Death of the Universe
SOJ2822 Buy Tickets
SOJ2937 Tetris
SOJ2968 Matrix(二维线段树)
SOJ3019 Count Color
SOJ3086 windy’s cake VI(二维线段树)
SOJ3099 A Simple Problem with Integers
SOJ3248 Mousetrap
SOJ3321 Windy’s Sequence II
SOJ3370 Light Switching
———————归并排序思想
SOJ2906 Ultra-QuickSort
SOJ2431 Cows distribute food(利用归并排序求逆序数：nlogn)
SOJ2497 Number sequence
SOJ2559 What is the Rank?
SOJ2728 MooFest
SOJ3009 Stones for Amy
SOJ3010 K-th Number
SOJ3147 K-th number
———————并查集
SOJ1824 The Suspects
SOJ1953 key
SOJ2245 Ubiquitous Religions
SOJ2389 Journey to Tibet
SOJ2438 Pet
SOJ2490 Math teacher’s test
POJ2832 How many pairs?
POJ2821 Auto-Calculation Machine
SOJ2979 食物链
———————后缀数组
SOJ3045 Long Long Message
SOJ3296 Windy’s S
———————————组合数学及数论—————————–
SOJ1839 Relatives(Euler函数)
SOJ2714 Mountains (II)
SOJ2668 C(n,k)
SOJ2666 分解 n!
SOJ2106 GCD & LCM Inverse
SOJ2498 Count prime
SOJ3191 Free square（容斥原理+二分）
SOJ2238 Let it Bead(置换群-polya定理的应用)
SOJ2924 完美交换（置换群）
SOJ2638 Cow Sorting（置换群）
SOJ3082 windy’s cake II(容斥原理的应用)
SOJ3502 The Almost Lucky Numbers(典型题 容斥原理)
———————————-博弈论————————————
SOJ1128 控 制 棋
SOJ1866 Games(诡异的博弈)
SOJ2197 A Funny Game
SOJ2188 A multiplication game
SOJ2403 Black and white chess
SOJ2845 Jange
SOJ2922 A New Tetris Game
SOJ2993 Nim
SOJ3066 John
SOJ3132 windy和水星 — 水星游戏 1
SOJ3133 windy和水星 — 水星游戏 2
SOJ3307 Stockholm Game
SOJ3461 Nim-k
SOJ3463 Ordered Nim
———————————–计算几何———————————
SOJ1138 Wall
SOJ1102 Picnic
————————————杂题————————————
SOJ2037 Language of FatMouse(排序+二分查找)
SOJ3336 Diary(26进制+（hash或者map))
SOJ2269 Very Simple Problem —————————–最优化问题————————————-
———————-动态规划
SOJ1162 I-Keyboard
SOJ2096 Maximum Submatrix
SOJ2111 littleken bg
SOJ2505 The County Fair
SOJ2818 QQ音速
SOJ2469 Exploring Pyramids
SOJ1833 Base Numbers
SOJ2009 Zeros and Ones
SOJ2032 The Lost House
SOJ2289 A decorative fence
SOJ2089 lykoo
SOJ2440 The days in fzk
SOJ2718 Bookshelf
SOJ2722 Treats for the Cows(二维状态，0维决策)
SOJ2726 Deck of Cards
SOJ2729 Space Elevator
SOJ2730 Lazy Cows
SOJ2702 Alanna
SOJ2713 Cut the Sequence
SOJ2768 Bomb
SOJ2779 Find the max (I) (最大M子段和问题)
SOJ2796 Letter Deletion(DP基础题，最长公共子序列问题)
SOJ2800 三角形
SOJ2804 Longest Ordered Subsequence (II)
SOJ2896 Alphacode (动态规划简单题)
SOJ2930 积木城堡
SOJ3037 Painting the balls
SOJ3104 Game(注意大数运算，高精度)
SOJ3264 Evil Game
SOJ3300 Stockholm Coins(背包问题)
SOJ3360 Buying Hay(背包问题)
SOJ3531 Number Pyramids(背包问题)
—————-状态DP
SOJ2089 lykoo
SOJ2819 Ader
SOJ2842 The TSP problem
SOJ3025 Artillery(状态DP)
SOJ3088 windy’s cake VIII
SOJ3259 Counting numbers
SOJ3262 Square Fields(二分+状态DP)
SOJ3371 Mixed Up Cows
————— 最优化之排序
(思考两个元素之间的先后关系，以此得出一个二元比较关系，并验证此关系可传递,反对称，进而排序)
SOJ2509 The Milk Queue
SOJ2547 cards
SOJ2850 Protecting the Flowers
SOJ2957 Setting Problems
SOJ3167 Computer
SOJ3331 Cards(2547加强版)
SOJ3327 Dahema’s Computer(通过此题学会排序)
—————–最优化之必要条件枚举
(思考最优解所具有的性质，得出最优解的一个强必要条件，在此基础上枚举）
SOJ3317 FGJ’s Plane
SOJ3429 Food portion sizes
——————————–贪心—————————————
SOJ1078 BlueEyes’ Schedule
SOJ1203 Pass-Muraille
SOJ1673 Gone Fishing
SOJ2645 Buy One Get One Free
SOJ2701 In a Cycle
SOJ2876 Antimonotonicity(经典模型 O(n)算法)
SOJ3343 Tower
——————————–搜索—————————————
SOJ1626 square
SOJ2061 8 puzzle
SOJ2485 Sudoku
SOJ1045 Sticks
SOJ2736 Fliptile
SOJ2771 Collecting Stones
SOJ2715 Maze Break
SOJ2829 binary strings(双向BFS)
SOJ3330 Windy’s Matrix(BFS)
——————————–DFA—————————————-
—————状态矩阵+DFA：
SOJ1826 Number Sequence
SOJ2552 Number of Tilings
SOJ2919 Matrix Power Series (学习矩阵的快速乘法从此开始)
SOJ2920 Magic Bean
SOJ3021 Quad Tiling
SOJ3046 Odd Loving Bakers
SOJ3176 E-string
SOJ3246 Tiling a Grid With Dominoes
SOJ3323 K-Satisfied Numbers
SOJ3337 Wqb’s Word
—————-DFA+DP
SOJ1112 Repeatless Numbers(DFA+二分)
SOJ2913 Number Substring
SOJ2826 Apocalypse Someday
SOJ3030 DNA Sequence(AC自动机+矩阵二分)
SOJ3128 windy和水星 — 水星数学家 1
SOJ3182 Windy numbers
———————————图论—————————————
——————–最短路+最小生成树+强连通
SOJ2832 Mars city(强连通分支，算法多多)
SOJ2198 Highways
SOJ3427 Dark roads(最小生成树，kruskal：快排+并查集)
SOJ3346 Best Spot（最短路，N^3放心的写）
SOJ3013 tree(树的最大—最小划分问题，二分+贪心，勉强算在图论里面吧。)
SOJ3056 Average distance(树上的DFS)
SOJ2427 Daizi’s path system（最短路）
SOJ1935 Electricity
SOJ2472 Guardian of Decency
SOJ1183 Courses
SOJ2468 Catcus
SOJ2751 Wormholes(SPFA判断负圈回路的存在性)
SOJ1677 How far away(最近公共祖先问题，LCA) ­
SOJ1075 BlueEyes and Apples (II) ­
SOJ2932 道路(最短路)
SOJ3160 Clear And Present Danger
———————二分图的匹配
SOJ1183 Girls and Boys
SOJ1981 Going Home
SOJ2077 Machine Schedule
SOJ2160 Optimal Milking
SOJ2681 平方数 2
SOJ2737 Asteroids
SOJ2806 LED Display
SOJ2958 Weird Fence
SOJ3043 Minimum Cost
SOJ3038 Beloved Sons（简单贪心一下）
SOJ3453 Stock Charts
ZOJ3265 Strange Game
———————————网络流————————————-
———————最大流
POJ 1273 Drainage Ditches
POJ 1274 The Perfect Stall (二分图匹配)
POJ 1698 Alice’s Chance
POJ 1459 Power Network
POJ 2112 Optimal Milking (二分)
POJ 2455 Secret Milking Machine (二分)
POJ 3189 Steady Cow Assignment (枚举)
POJ 1637 Sightseeing tour (混合图欧拉回路)
POJ 3498 March of the Penguins (枚举汇点)
POJ 1087 A Plug for UNIX
POJ 1149 Pigs (构图题)
ZOJ 2760 How Many Shortest Path (边不相交最短路的条数)
POJ 2391 Ombrophobic Bovines (必须拆点，否则有BUG)
WHU 1124 Football Coach (构图题)
SGU 326 Perspective (构图题，类似于 WHU 1124)
UVa 563 Crimewave
UVa 820 Internet Bandwidth
POJ 3281 Dining (构图题)
POJ 3436 ACM Computer Factory
POJ 2289 Jamie’s Contact Groups (二分)
SGU 438 The Glorious Karlutka River =) (按时间拆点)
SGU 242 Student’s Morning (输出一组解)
SGU 185 Two shortest (Dijkstra 预处理，两次增广，必须用邻接阵实现，否则 MLE)
HOJ 2816 Power Line
POJ 2699 The Maximum Number of Strong Kings (枚举+构图)
ZOJ 2332 Gems
JOJ 2453 Candy (构图题)
SOJ3312 Stockholm Knights
SOJ3353 Total Flow
SOJ2414 Leapin’ Lizards
——————–最小割
SOJ3106 Dual Core CPU
SOJ3109 Space flight
SOJ3107 Select
SOJ3185 Black and white
SOJ3254 Rain and Fgj
SOJ3134 windy和水星 — 水星交通
HOJ 2634 How to earn more
ZOJ 2071 Technology Trader (找割边)
HNU 10940 Coconuts
ZOJ 2532 Internship (找关键割边)
POJ 1815 Friendship (字典序最小的点割集)
POJ 3204 Ikki’s Story I – Road Reconstruction (找关键割边)
POJ 3308 Paratroopers
POJ 3084 Panic Room
POJ 3469 Dual Core CPU
ZOJ 2587 Unique Attack (最小割的唯一性判定)
POJ 2125 Destroying The Graph (找割边)
ZOJ 2539 Energy Minimization
TJU 2944 Mussy Paper (最大权闭合子图)
POJ 1966 Cable TV Network (无向图点连通度)
HDU 1565 方格取数(1) (最大点权独立集)
HDU 1569 方格取数(2) (最大点权独立集)
POJ 2987 Firing (最大权闭合子图)
SPOJ 839 Optimal Marks (将异或操作转化为对每一位求最小割)
HOJ 2811 Earthquake Damage (最小点割集)
2008 Beijing Regional Contest Problem A Destroying the bus stations ( BFS 预处理 )
ZOJ 2676 Network Wars (参数搜索)
POJ 3155 Hard Life (参数搜索)
ZOJ 3241 Being a Hero
—————–有上下界
ZOJ 2314 Reactor Cooling (无源汇可行流)
POJ 2396 Budget (有源汇可行流)
SGU 176 Flow Construction (有源汇最小流)
ZOJ 3229 Shoot the Bullet (有源汇最大流)
HDU 3157 Crazy Circuits (有源汇最小流)
—————–最小费用流
HOJ 2715 Matrix3
HOJ 2739 The Chinese Postman Problem
POJ 2175 Evacuation Plan (消一次负圈)
POJ 3422 Kaka’s Matrix Travels (与 Matrix3 类似)
POJ 2516 Minimum Cost (按物品种类多次建图)
POJ 2195 Going Home
BUAA 1032 Destroying a Painting
POJ 2400 Supervisor, Supervisee (输出所有最小权匹配)
POJ 3680 Intervals
HOJ 2543 Stone IV
POJ 2135 Farm Tour
SOJ 3186 Segments
———————————–数据结构———————————
———————线段树
SOJ1862 Choice Pears
SOJ2057 The manager’s worry
SOJ2249 Mayor’s posters
SOJ2436 Picture puzzle game
SOJ2556 Find the Permutation
SOJ2562 The End of Corruption
SOJ2719 Corral the Cows(线段树+二分)
SOJ2740 Balanced Lineup
SOJ2745 零序列
SOJ2776 Matrix Searching
SOJ2808 Thermal Death of the Universe
SOJ2822 Buy Tickets
SOJ2937 Tetris
SOJ2968 Matrix(二维线段树)
SOJ3019 Count Color
SOJ3086 windy’s cake VI(二维线段树)
SOJ3099 A Simple Problem with Integers
SOJ3248 Mousetrap
SOJ3321 Windy’s Sequence II
SOJ3370 Light Switching
———————归并排序思想
SOJ2906 Ultra-QuickSort
SOJ2431 Cows distribute food(利用归并排序求逆序数：nlogn)
SOJ2497 Number sequence
SOJ2559 What is the Rank?
SOJ2728 MooFest
SOJ3009 Stones for Amy
SOJ3010 K-th Number
SOJ3147 K-th number
———————并查集
SOJ1824 The Suspects
SOJ1953 key
SOJ2245 Ubiquitous Religions
SOJ2389 Journey to Tibet
SOJ2438 Pet
SOJ2490 Math teacher’s test
POJ2832 How many pairs?
POJ2821 Auto-Calculation Machine
SOJ2979 食物链
———————后缀数组
SOJ3045 Long Long Message
SOJ3296 Windy’s S
———————————组合数学及数论—————————–
SOJ1839 Relatives(Euler函数)
SOJ2714 Mountains (II)
SOJ2668 C(n,k)
SOJ2666 分解 n!
SOJ2106 GCD & LCM Inverse
SOJ2498 Count prime
SOJ3191 Free square（容斥原理+二分）
SOJ2238 Let it Bead(置换群-polya定理的应用)
SOJ2924 完美交换（置换群）
SOJ2638 Cow Sorting（置换群）
SOJ3082 windy’s cake II(容斥原理的应用)
SOJ3502 The Almost Lucky Numbers(典型题 容斥原理)
———————————-博弈论————————————
SOJ1128 控 制 棋
SOJ1866 Games(诡异的博弈)
SOJ2197 A Funny Game
SOJ2188 A multiplication game
SOJ2403 Black and white chess
SOJ2845 Jange
SOJ2922 A New Tetris Game
SOJ2993 Nim
SOJ3066 John
SOJ3132 windy和水星 — 水星游戏 1
SOJ3133 windy和水星 — 水星游戏 2
SOJ3307 Stockholm Game
SOJ3461 Nim-k
SOJ3463 Ordered Nim
———————————–计算几何———————————
SOJ1138 Wall
SOJ1102 Picnic
————————————杂题————————————
SOJ2037 Language of FatMouse(排序+二分查找)
SOJ3336 Diary(26进制+（hash或者map))
SOJ2269 Very Simple Problem —————————–最优化问题————————————-
———————-动态规划
SOJ1162 I-Keyboard
SOJ2096 Maximum Submatrix
SOJ2111 littleken bg
SOJ2505 The County Fair
SOJ2818 QQ音速
SOJ2469 Exploring Pyramids
SOJ1833 Base Numbers
SOJ2009 Zeros and Ones
SOJ2032 The Lost House
SOJ2289 A decorative fence
SOJ2089 lykoo
SOJ2440 The days in fzk
SOJ2718 Bookshelf
SOJ2722 Treats for the Cows(二维状态，0维决策)
SOJ2726 Deck of Cards
SOJ2729 Space Elevator
SOJ2730 Lazy Cows
SOJ2702 Alanna
SOJ2713 Cut the Sequence
SOJ2768 Bomb
SOJ2779 Find the max (I) (最大M子段和问题)
SOJ2796 Letter Deletion(DP基础题，最长公共子序列问题)
SOJ2800 三角形
SOJ2804 Longest Ordered Subsequence (II)
SOJ2896 Alphacode (动态规划简单题)
SOJ2930 积木城堡
SOJ3037 Painting the balls
SOJ3104 Game(注意大数运算，高精度)
SOJ3264 Evil Game
SOJ3300 Stockholm Coins(背包问题)
SOJ3360 Buying Hay(背包问题)
SOJ3531 Number Pyramids(背包问题)
—————-状态DP
SOJ2089 lykoo
SOJ2819 Ader
SOJ2842 The TSP problem
SOJ3025 Artillery(状态DP)
SOJ3088 windy’s cake VIII
SOJ3259 Counting numbers
SOJ3262 Square Fields(二分+状态DP)
SOJ3371 Mixed Up Cows
————— 最优化之排序
(思考两个元素之间的先后关系，以此得出一个二元比较关系，并验证此关系可传递,反对称，进而排序)
SOJ2509 The Milk Queue
SOJ2547 cards
SOJ2850 Protecting the Flowers
SOJ2957 Setting Problems
SOJ3167 Computer
SOJ3331 Cards(2547加强版)
SOJ3327 Dahema’s Computer(通过此题学会排序)
—————–最优化之必要条件枚举
(思考最优解所具有的性质，得出最优解的一个强必要条件，在此基础上枚举）
SOJ3317 FGJ’s Plane
SOJ3429 Food portion sizes
——————————–贪心—————————————
SOJ1078 BlueEyes’ Schedule
SOJ1203 Pass-Muraille
SOJ1673 Gone Fishing
SOJ2645 Buy One Get One Free
SOJ2701 In a Cycle
SOJ2876 Antimonotonicity(经典模型 O(n)算法)
SOJ3343 Tower
——————————–搜索—————————————
SOJ1626 square
SOJ2061 8 puzzle
SOJ2485 Sudoku
SOJ1045 Sticks
SOJ2736 Fliptile
SOJ2771 Collecting Stones
SOJ2715 Maze Break
SOJ2829 binary strings(双向BFS)
SOJ3330 Windy’s Matrix(BFS)
——————————–DFA—————————————-
—————状态矩阵+DFA：
SOJ1826 Number Sequence
SOJ2552 Number of Tilings
SOJ2919 Matrix Power Series (学习矩阵的快速乘法从此开始)
SOJ2920 Magic Bean
SOJ3021 Quad Tiling
SOJ3046 Odd Loving Bakers
SOJ3176 E-string
SOJ3246 Tiling a Grid With Dominoes
SOJ3323 K-Satisfied Numbers
SOJ3337 Wqb’s Word
—————-DFA+DP
SOJ1112 Repeatless Numbers(DFA+二分)
SOJ2913 Number Substring
SOJ2826 Apocalypse Someday
SOJ3030 DNA Sequence(AC自动机+矩阵二分)
SOJ3128 windy和水星 — 水星数学家 1
SOJ3182 Windy numbers
———————————图论—————————————
——————–最短路+最小生成树+强连通
SOJ2832 Mars city(强连通分支，算法多多)
SOJ2198 Highways
SOJ3427 Dark roads(最小生成树，kruskal：快排+并查集)
SOJ3346 Best Spot（最短路，N^3放心的写）
SOJ3013 tree(树的最大—最小划分问题，二分+贪心，勉强算在图论里面吧。)
SOJ3056 Average distance(树上的DFS)
SOJ2427 Daizi’s path system（最短路）
SOJ1935 Electricity
SOJ2472 Guardian of Decency
SOJ1183 Courses
SOJ2468 Catcus
SOJ2751 Wormholes(SPFA判断负圈回路的存在性)
SOJ1677 How far away(最近公共祖先问题，LCA) ­
SOJ1075 BlueEyes and Apples (II) ­
SOJ2932 道路(最短路)
SOJ3160 Clear And Present Danger
———————二分图的匹配
SOJ1183 Girls and Boys
SOJ1981 Going Home
SOJ2077 Machine Schedule
SOJ2160 Optimal Milking
SOJ2681 平方数 2
SOJ2737 Asteroids
SOJ2806 LED Display
SOJ2958 Weird Fence
SOJ3043 Minimum Cost
SOJ3038 Beloved Sons（简单贪心一下）
SOJ3453 Stock Charts
ZOJ3265 Strange Game
———————————网络流————————————-
———————最大流
POJ 1273 Drainage Ditches
POJ 1274 The Perfect Stall (二分图匹配)
POJ 1698 Alice’s Chance
POJ 1459 Power Network
POJ 2112 Optimal Milking (二分)
POJ 2455 Secret Milking Machine (二分)
POJ 3189 Steady Cow Assignment (枚举)
POJ 1637 Sightseeing tour (混合图欧拉回路)
POJ 3498 March of the Penguins (枚举汇点)
POJ 1087 A Plug for UNIX
POJ 1149 Pigs (构图题)
ZOJ 2760 How Many Shortest Path (边不相交最短路的条数)
POJ 2391 Ombrophobic Bovines (必须拆点，否则有BUG)
WHU 1124 Football Coach (构图题)
SGU 326 Perspective (构图题，类似于 WHU 1124)
UVa 563 Crimewave
UVa 820 Internet Bandwidth
POJ 3281 Dining (构图题)
POJ 3436 ACM Computer Factory
POJ 2289 Jamie’s Contact Groups (二分)
SGU 438 The Glorious Karlutka River =) (按时间拆点)
SGU 242 Student’s Morning (输出一组解)
SGU 185 Two shortest (Dijkstra 预处理，两次增广，必须用邻接阵实现，否则 MLE)
HOJ 2816 Power Line
POJ 2699 The Maximum Number of Strong Kings (枚举+构图)
ZOJ 2332 Gems
JOJ 2453 Candy (构图题)
SOJ3312 Stockholm Knights
SOJ3353 Total Flow
SOJ2414 Leapin’ Lizards
——————–最小割
SOJ3106 Dual Core CPU
SOJ3109 Space flight
SOJ3107 Select
SOJ3185 Black and white
SOJ3254 Rain and Fgj
SOJ3134 windy和水星 — 水星交通
HOJ 2634 How to earn more
ZOJ 2071 Technology Trader (找割边)
HNU 10940 Coconuts
ZOJ 2532 Internship (找关键割边)
POJ 1815 Friendship (字典序最小的点割集)
POJ 3204 Ikki’s Story I – Road Reconstruction (找关键割边)
POJ 3308 Paratroopers
POJ 3084 Panic Room
POJ 3469 Dual Core CPU
ZOJ 2587 Unique Attack (最小割的唯一性判定)
POJ 2125 Destroying The Graph (找割边)
ZOJ 2539 Energy Minimization
TJU 2944 Mussy Paper (最大权闭合子图)
POJ 1966 Cable TV Network (无向图点连通度)
HDU 1565 方格取数(1) (最大点权独立集)
HDU 1569 方格取数(2) (最大点权独立集)
POJ 2987 Firing (最大权闭合子图)
SPOJ 839 Optimal Marks (将异或操作转化为对每一位求最小割)
HOJ 2811 Earthquake Damage (最小点割集)
2008 Beijing Regional Contest Problem A Destroying the bus stations ( BFS 预处理 )(http://acmicpc-live-archive.uva.es/nuevoportal/data/problem.php?p=4322)
ZOJ 2676 Network Wars (参数搜索)
POJ 3155 Hard Life (参数搜索)
ZOJ 3241 Being a Hero
—————–有上下界
ZOJ 2314 Reactor Cooling (无源汇可行流)
POJ 2396 Budget (有源汇可行流)
SGU 176 Flow Construction (有源汇最小流)
ZOJ 3229 Shoot the Bullet (有源汇最大流)
HDU 3157 Crazy Circuits (有源汇最小流)
—————–最小费用流
HOJ 2715 Matrix3
HOJ 2739 The Chinese Postman Problem
POJ 2175 Evacuation Plan (消一次负圈)
POJ 3422 Kaka’s Matrix Travels (与 Matrix3 类似)
POJ 2516 Minimum Cost (按物品种类多次建图)
POJ 2195 Going Home
BUAA 1032 Destroying a Painting
POJ 2400 Supervisor, Supervisee (输出所有最小权匹配)
POJ 3680 Intervals
HOJ 2543 Stone IV
POJ 2135 Farm Tour
SOJ 3186 Segments
———————————–数据结构———————————
———————线段树
SOJ1862 Choice Pears
SOJ2057 The manager’s worry
SOJ2249 Mayor’s posters
SOJ2436 Picture puzzle game
SOJ2556 Find the Permutation
SOJ2562 The End of Corruption
SOJ2719 Corral the Cows(线段树+二分)
SOJ2740 Balanced Lineup
SOJ2745 零序列
SOJ2776 Matrix Searching
SOJ2808 Thermal Death of the Universe
SOJ2822 Buy Tickets
SOJ2937 Tetris
SOJ2968 Matrix(二维线段树)
SOJ3019 Count Color
SOJ3086 windy’s cake VI(二维线段树)
SOJ3099 A Simple Problem with Integers
SOJ3248 Mousetrap
SOJ3321 Windy’s Sequence II
SOJ3370 Light Switching
———————归并排序思想
SOJ2906 Ultra-QuickSort
SOJ2431 Cows distribute food(利用归并排序求逆序数：nlogn)
SOJ2497 Number sequence
SOJ2559 What is the Rank?
SOJ2728 MooFest
SOJ3009 Stones for Amy
SOJ3010 K-th Number
SOJ3147 K-th number
———————并查集
SOJ1824 The Suspects
SOJ1953 key
SOJ2245 Ubiquitous Religions
SOJ2389 Journey to Tibet
SOJ2438 Pet
SOJ2490 Math teacher’s test
POJ2832 How many pairs?
POJ2821 Auto-Calculation Machine
SOJ2979 食物链
———————后缀数组
SOJ3045 Long Long Message
SOJ3296 Windy’s S
———————————组合数学及数论—————————–
SOJ1839 Relatives(Euler函数)
SOJ2714 Mountains (II)
SOJ2668 C(n,k)
SOJ2666 分解 n!
SOJ2106 GCD & LCM Inverse
SOJ2498 Count prime
SOJ3191 Free square（容斥原理+二分）
SOJ2238 Let it Bead(置换群-polya定理的应用)
SOJ2924 完美交换（置换群）
SOJ2638 Cow Sorting（置换群）
SOJ3082 windy’s cake II(容斥原理的应用)
SOJ3502 The Almost Lucky Numbers(典型题 容斥原理)
———————————-博弈论————————————
SOJ1128 控 制 棋
SOJ1866 Games(诡异的博弈)
SOJ2197 A Funny Game
SOJ2188 A multiplication game
SOJ2403 Black and white chess
SOJ2845 Jange
SOJ2922 A New Tetris Game
SOJ2993 Nim
SOJ3066 John
SOJ3132 windy和水星 — 水星游戏 1
SOJ3133 windy和水星 — 水星游戏 2
SOJ3307 Stockholm Game
SOJ3461 Nim-k
SOJ3463 Ordered Nim
———————————–计算几何———————————
SOJ1138 Wall
SOJ1102 Picnic
————————————杂题————————————
SOJ2037 Language of FatMouse(排序+二分查找)
SOJ3336 Diary(26进制+（hash或者map))
SOJ2269 Very Simple Problem