小寒

问题描述　　观察这个数列：　　1 3 0 2 -1 1 -2 ...　　这个数列中后一项总是比前一项增加2或者减少3。　　栋栋对这种数列很好奇，他想知道长度为 n 和为 s 而且后一项总是比前一项增加a或者减少b的整数数列可能有多少种呢？输入格式　　输入的第一行包含四个整数 n s a b，含义如前面说述。输出格式　　输出一行，包含一个整

HopscotchTime Limit: 1000MS Memory Limit: 65536KTotal Submissions: 2419 Accepted: 1728DescriptionThe cows play the child's game of hopscotch in a non-traditional way. Instead of a linear set

Lake CountingTime Limit: 1000MS Memory Limit: 65536KTotal Submissions: 22854 Accepted: 11526DescriptionDue to recent rains, water has pooled in various places in Farmer John's field, which i

pilot系列之最基础的穷竭搜索（初级篇）C题意：药药!切克闹! 煎饼果子来一套!有一个烤饼器可以烤r行c列的煎饼，煎饼可以正面朝上（用1表示）也可以背面朝上（用0表示）。一次可将同一行或同一列的煎饼全部翻转。现在需要把尽可能多的煎饼翻成正面朝上，问最多能使多少煎饼正面朝上？输入：多组输入，每组第一行为二整数r, c (1 ≤ r ≤ 10, 1 ≤ c ≤ 10 000)，剩下r行c列表

Network SaboteurTime Limit: 2000MS Memory Limit: 65536KTotal Submissions: 9706 Accepted: 4633DescriptionA university network is composed of N computers. System administrators gathered inform

Oil DepositsTime Limit: 1000MS Memory Limit: 10000KTotal Submissions: 13709 Accepted: 7473DescriptionThe GeoSurvComp geologic survey company is responsible for detecting underground oil depo

棋盘问题Time Limit: 1000MS Memory Limit: 10000KTotal Submissions: 25790 Accepted: 12756Description在一个给定形状的棋盘（形状可能是不规则的）上面摆放棋子，棋子没有区别。要求摆放时任意的两个棋子不能放在棋盘中的同一行或者同一列，请编程求解对于给定形状和大小的棋盘，摆放k个棋子的所有可行的摆放

Fire NetTime Limit: 2000/1000 MS (Java/Others) Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 7281 Accepted Submission(s): 4150Problem DescriptionSuppose that we have a sq

Image PerimetersTime Limit: 1000MS Memory Limit: 10000KTotal Submissions: 8178 Accepted: 4903DescriptionTechnicians in a pathology lab analyze digitized images of slides. Objects on a slide

Knight MovesTime Limit: 1000MS Memory Limit: 30000KTotal Submissions: 22794 Accepted: 10654DescriptionBackground Mr Somurolov, fabulous chess-gamer indeed, asserts that no one else but him

迷宫问题Time Limit: 1000MS Memory Limit: 65536KTotal Submissions: 9877 Accepted: 5848Description定义一个二维数组： int maze[5][5] = {0, 1, 0, 0, 0,0, 1, 0, 1, 0,0, 0, 0, 0, 0,0, 1, 1,

Knight MovesTime Limit: 2000/1000 MS (Java/Others) Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 8010 Accepted Submission(s): 4719Problem DescriptionA friend of you is do

Catch That CowTime Limit: 2000MS Memory Limit: 65536KTotal Submissions: 54362 Accepted: 16996DescriptionFarmer John has been informed of the location of a fugitive cow and wants to catch her

Red and BlackTime Limit: 2000/1000 MS (Java/Others) Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 11822 Accepted Submission(s): 7363Problem DescriptionThere is a rectangu

Tempter of the BoneTime Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 76119    Accepted Submission(s): 20867Problem DescriptionThe

Prime Ring ProblemTime Limit: 4000/2000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 28915    Accepted Submission(s): 12881Problem DescriptionA rin

RoadblocksTime Limit: 2000MS Memory Limit: 65536KTotal Submissions: 9479 Accepted: 3369DescriptionBessie has moved to a small farm and sometimes enjoys returning to visit one of her best f