题意： 给出一个数，判断这个数是质数并且一直迭代它的平方和直到它能变成1，如果是输出“YES”，否则输出“NO”. 题解： 先筛素数，再处理即可 代码： #include <iostream> #include <algorithm> #include <cstdio> #include <cstring> #include <cmath> #include <cctype> #include <map> #include <…
题目描述 Mrs. Chambers always has her class line up in height order (shortest at the front of the line). Every September a new class of exactly 20 3rd graders arrive, all of different height. For the first few days it takes a long time to get the kids in height or…
题意： 给出12个数字，如果一个子序列的两个端点及以内的每一个元素都大于子序列端点两边前一个和后一个数字，那么这个子序列称之为岛，求出这个序列一共有多少个岛。 题解： 暴力枚举 代码： #include <iostream> #include <algorithm> #include <cstdio> #include <cstring> #include <cmath> #include <cctype> #include <map&g…
题目描述 In golf croquet doubles, two teams of 2 play each other. Each player has their own ball which they hit when it is their turn. A turn comprises one hit of the ball. There are 6 hoops which are each played twice, once in each direction, in a prescribed orde…
题目描述 Parity is an important concept in data transmission. Because the process is not error proof, parity is used to provide a check on whether or not data has been corrupted in transmission. If even parity is being used, each byte will have an even number of 1…
题目描述 Recently discovered on a distant planet, a race of aliens has music a bit like ours (notes A, B, C, D, E, F and G) but without any sharps or flats. Like our music, after G they start again at A. To these aliens, beautiful music is any sequence of notes wh…
题意： 给定一个起始点（1~8），在给一个字符和数字的组合，字符代表方向，A：逆时针，C:顺时针，数字代表步数，输出每次走到的位置，如果访问的站点少于5个或者一个站点重复走，则输出“reject”。 题解： 模拟 代码： #include <cstdio> #include <cstring> #include <cmath> #include <cctype> #include <iostream> #include <algorithm> …
题目描述 Musical chairs is a game frequently played at children’s parties. Players are seated in a circle facing outwards. When the music starts, the players have to stand up and move clockwise round the chairs. One chair is removed, and when the music stops the p…
题目描述 Shona is a linguistics student who has an assignment to analyse letter distribution in sentences taken from various sources. Your task is to write a program to help her. The problem is to plot a graph showing how many of each letter appear in the sentence…
题目描述 League football (known in some circles as soccer) has been played in England since 1888 and is the most popular winter game through most of Europe, just as rugby is in New Zealand. English newspapers and many Websites publish the latest results and the cu…
