题目链接:https://codeforces.com/contest/1090/problem/B Examplesstandard input The most famous characters of Pushkin’s works are Onegin \cite{onegin}, Dubrovsky \cite{dubrovsky} and Tsar Saltan \cite{saltan}. \begin{thebibliography}{99} \bibitem{saltan} A…
题目链接:https://codeforces.com/contest/1090/problem/A A conglomerate consists of n companies. To make managing easier, their owners have decided to merge all companies into one. By law, it is only possible to merge two companies, so the owners plan to s…
题目链接:https://codeforces.com/contest/1090/problem/D Vasya had an array of n integers, each element of the array was from 1 to n. He chose m pairs of different positions and wrote them down to a sheet of paper. Then Vasya compared the elements at these…
题目链接:https://codeforces.com/contest/1090/problem/M There are n houses along the road where Anya lives, each one is painted in one of k possible colors. Anya likes walking along this road, but she doesn't like when two adjacent houses at the road have…
Tree Ming and Hong are playing a simple game called nim game. They have nn piles of stones numbered 11 to nn ,the ii-th pile of stones has a_iai stones. There are n - 1n−1 bidirectional roads in total. For any two piles, there is a unique path from…
比赛链接:传送门 前期大顺风,2:30金区中游.后期开题乏力,掉到银尾.4:59绝杀I,但罚时太高卡在银首. Problem A - Dogs and Cages 00:09:45 (+) Solved by Dancepted 算了半天发现就是n-1,被队友喷死,差点气哭. Problem E - Evil Forest 00:16:54 (+) Solved by xk xk大喊签到,就过了. 代码: #include <iostream> #include <cmath> #…
We call a string as a 0689-string if this string only consists of digits '0', '6', '8' and '9'. Given a 0689-string $s$ of length $n$, one must do the following operation exactly once: select a non-empty substring of $s$ and rotate it 180 degrees. Mo…
BaoBao has just found a grid with $n$ rows and $m$ columns in his left pocket, where the cell in the $j$-th column of the $i$-th row (indicated by $(i, j)$) contains an arrow (pointing either upwards, downwards, leftwards or rightwards) and an intege…
Travel There are nn planets in the MOT galaxy, and each planet has a unique number from 1 \sim n1∼n. Each planet is connected to other planets through some transmission channels. There are mm transmission channels in the galaxy. Each transmission cha…
Swap There is a sequence of numbers of length nn, and each number in the sequence is different. There are two operations: Swap the first half and the last half of the sequence (if nn is odd, the middle number does not change) Swap all the numbers in…
Angel's Journey “Miyane!” This day Hana asks Miyako for help again. Hana plays the part of angel on the stage show of the cultural festival, and she is going to look for her human friend, Hinata. So she must find the shortest path to Hinata’s house.…
Tasks It's too late now, but you still have too much work to do. There are nn tasks on your list. The ii-th task costs you t_itiseconds. You want to go to bed TT seconds later. During the TT seconds, you can choose some tasks to do in order to finis…
题目链接:http://codeforces.com/contest/832/problem/B B. Petya and Exam time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output It's hard times now. Today Petya needs to score 100 points on Informatics…
The digital root of a positive integer is found by summing the digits of the integer. If the resulting value is a single digit then that digit is the digital root. If the resulting value contains two or more digits, those digits are summed and the pr…
