放在Virtual Judge上的专题：
sum = 7 ;
[ 题解 ] [ 树状数组 ] POJ 2352 - Stars
https://www.cnblogs.com/Kaidora/p/10389073.html
[ 题解 ] [ BFS ] POJ 1426 - Find The Multiple
https://www.cnblogs.com/Kaidora/p/10392293.html
[ 题解 ] [ DFS ] [ 连通块 ] POJ 2386 - Lake Counting / 1979 - Red and Black
https://www.cnblogs.com/Kaidora/p/10392641.html
[ 题解 ] [ BFS ] [ 无AC代码仅讲解 ] CodeForces Gym 101755 H. Safe Path
https://www.cnblogs.com/Kaidora/p/10406614.html
[ 题解 ] [ 最长递增子序列 ? / 贪心 ! ] HDU 1257 - 最少拦截系统
https://www.cnblogs.com/Kaidora/p/10514202.html
[ 题解 ] [ 最长上升子序列(和) / DP动态规划 ] HDU – 1087 Super Jumping! Jumping! Jumping!
https://www.cnblogs.com/Kaidora/p/10518645.html
放在CodeForces上的训练：
sum = 3 ;
[ 题解 ] [ 暴力 ] CodeForces 976/C C. Nested Segments
https://www.cnblogs.com/Kaidora/p/10473879.html
[ 题解 ] [ 映射 ] G. Santa Claus and Keyboard Check （待更名）
https://www.cnblogs.com/Kaidora/p/10520672.html
[ 题解 ] [ 贪心 ] H. Roma and Changing Signs （待更名）
https://www.cnblogs.com/Kaidora/p/10527490.html
放在CodeForces上的比赛：
sum = 15 ;
[ 题解 ] A. The Bucket List （待更名）
https://www.cnblogs.com/Kaidora/p/10389908.html
[ 题解 ] [ 动态规划 ] B. Teamwork
https://www.cnblogs.com/Kaidora/p/10540019.html
[ 题解 ] G. Back and Forth （待更名）
https://www.cnblogs.com/Kaidora/p/10390018.html
[ 题解 ] C. Mooyo Mooyo （待更名）
https://www.cnblogs.com/Kaidora/p/10416124.html
[ 题解 ] [ 二分+模拟 ] E. Convention
https://www.cnblogs.com/Kaidora/p/10534661.html
[ 题解 ] [ 模拟 ] H. Mixing Milk
https://www.cnblogs.com/Kaidora/p/10529768.html
[ 题解 ] [ 逆推 ] A. Taming the Herd
https://www.cnblogs.com/Kaidora/p/10534686.html
[ 题解 ] [ 模拟 ] B. Hoofball
https://www.cnblogs.com/Kaidora/p/10534675.html
[ 题解 ] [ 贪心 ] C. Rest Stops （待更名）
https://www.cnblogs.com/Kaidora/p/10520688.html
[ 题解 ] [ 公式 ] F. Teleportation
https://www.cnblogs.com/Kaidora/p/10534691.html
[ 题解 ] [ 排序 ] A. Out of Sorts
https://www.cnblogs.com/Kaidora/p/10537183.html
[ 题解 ] [ 排序 ] F. Out of Sorts II
https://www.cnblogs.com/Kaidora/p/10539831.html
[ 题解 ] [ 集合 ] C. Team Tic Tac Toe （待更名）
https://www.cnblogs.com/Kaidora/p/10526396.html
[ 题解 ] [ 贪心 ] D. Lemonade Line （待更名）
https://www.cnblogs.com/Kaidora/p/10527305.html
[ 题解 ] [ 最小公共父节点 ] E. Family Tree
https://www.cnblogs.com/Kaidora/p/10534701.html