codeforces 1217E E. Sum Queries? （线段树 传送门：https://codeforces.com/contest/1217/problem/E 题意： n个数，m次询问 单点修改 询问区间内最小的unbalanced number balanced ...

传送门: 1327- E. Count The Blocks 题意：给你一个整数n，求10^n内（每个数有前导零）长度为1到n的块分别有多少个。块的含义是连续相同数字的长度。 题解：从n=1开始枚举，ans数组记录每个长度的块的个数。当前的ans[n]的值就是下一个n++后的ans[n]的值 ...

E. Editor The development of a text editor is a hard problem. You need to implement an extra module for brackets coloring in text. Your editor ...

传送门：>Here< 题意：询问给出一棵无根树上任意两点$a,b$，求关于所有点$i$，$dist(a,i) = dist(b,i)$的点的数量。要求每一次询问在$O(log n) ...

Codeforces Round #600 (Div. 2) E. Antenna Coverage（dp） 题目链接 题意： m个Antenna，每个Antenna的位置是$x_i$，分数是$s_i$,覆盖范围是$[x_i - s_i; x_i + s_i]$,每个硬币可以使一个 ...

Educational Codeforces Round 76 (Rated for Div. 2) E. The Contest（dp+线段树） 题目链接 题意： 给定3个人互不相同的多个数字，可以把数字移动给别人，问最少移动几次后可以使第一个人的数字为1~m1,第二个人m1~m2,第三个 ...

E. Prefix Enlightenment time limit per test3 seconds memory limit per test256 megabytes There are n lamps on a line, numbered from 1 to n. Each one ...

E. Yet Another Division Into Teams There are n students at your university. The programming skill of the i-th student is ai. As a coach, you want ...