Educational Codeforces Round 40 (Rated for Div. 2)

从这里开始 小结 题目列表 Problem A Diagonal Walking Problem B String Typing Problem C Matrix Walk Problem D Fight Against Traffic Problem E Water Taps Problem F Runner's Problem Problem G Castle Defense Problem H Path Counting Problem I Yet Another String Match

Educational Codeforces Round 36 (Rated for Div. 2) F. Imbalance Value of a Tree You are given a tree T consisting of n vertices. A number is written on each vertex; the number written on vertex i is ai. Let's denote the function I(x,?y) as the differ

Educational Codeforces Round 69 (Rated for Div. 2) B - Pillars There are n pillars aligned in a row and numbered from 1 to n. Initially each pillar contains exactly one disk. The i-th pillar contains a disk having radius ai. You can move these disks

原文链接:https://www.cnblogs.com/xwl3109377858/p/11404050.html Educational Codeforces Round 71 (Rated for Div. 2) A - There Are Two Types Of Burgers There are two types of burgers in your restaurant — hamburgers and chicken burgers! To assemble a hamburg

原文链接:https://www.cnblogs.com/xwl3109377858/p/11405773.html Educational Codeforces Round 71 (Rated for Div. 2) D - Number Of Permutations You are given a sequence of n pairs of integers: (a1,b1),(a2,b2),…,(an,bn). This sequence is called bad if it is

A. New Year Garland (CF 1279 A) 题目大意 给定红绿蓝三种颜色灯的数量,问能否摆成一排,使得相邻颜色不相同. 解题思路 植树问题.考虑数量最多为\(n\)的颜色的灯俩俩不相邻,那么其他颜色的灯的数量和要大于\(n-1\)即可,大过\(n-1\)的灯直接插到里面就好了. 神奇的代码 #include <bits/stdc++.h> #define MIN(a,b) ((((a)<(b)?(a):(b)))) #define MAX(a,b) ((((a)>

Educational Codeforces Round 36 (Rated for Div. 2) 题目的质量很不错(不看题解做不出来,笑 Codeforces 920C 题意 给定一个\(1\)到\(n\)组成的数组,只可以交换某些相邻的位置,问是否可以将数组调整为升序的 解题思路 首先如果每个数都能通过交换到它应该到的位置,那么就可以调整为升序的. 但实际上交换是对称的,如果应该在的位置在当前位置前方的数都交换完成,那么整体就是排好序的,因为不可能所有不在相应位置的数都在相应位置的后方.

Codeforces Educational Codeforces Round 44 (Rated for Div. 2) E. Pencils and Boxes 题目连接: http://codeforces.com/contest/985/problem/E Description Mishka received a gift of multicolored pencils for his birthday! Unfortunately he lives in a monochrome w

Educational Codeforces Round 55 (Rated for Div. 2) 链接 A Vasya and Book 傻逼题..注意判边界. #include<cstdio> #include<cstring> #include<algorithm> #include<queue> #include<set> #include<map> #include<vector> #include<cm