摘要：RealPhobiaTime Limit: 2000/1000 MS (Java/Others)Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 69Accepted Submission(s): 27Problem DescriptionBert is a programmer with a real fear of floating point arithmetic. Bert has quite successfully used rational numbers to write his programs but 阅读全文

摘要：The BalanceTime Limit: 5000MSMemory Limit: 65536KTotal Submissions: 2490Accepted: 1091DescriptionMs. Iyo Kiffa-Australis has a balance and only two kinds of weights to measure a dose of medicine. For example, to measure 200mg of aspirin using 300mg weights and 700mg weights, she can put one 700mg we 阅读全文

摘要：#include<stdio.h>#include<string.h>#include<iostream>using namespace std;char str[1000];char name[100];char ans1[100],ans2[100],ans3[100],ans4[100],ans5[100];int main(){ // freopen("test.in","r",stdin); // freopen("test.out","w",stdout); int 阅读全文

摘要：Oil SkimmingTime Limit: 2000/1000 MS (Java/Others)Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 87Accepted Submission(s): 50Problem DescriptionThanks to a certain "green" resources company, there is a new profitable industry of oil skimming. There are large slicks of crude 阅读全文

摘要：选课时间(题目已修改,注意读题)Time Limit: 1000/1000 MS (Java/Others)Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 1516Accepted Submission(s): 1253Problem Description又到了选课的时间了，xhd看着选课表发呆，为了想让下一学期好过点，他想知道学n个学分共有多少组合。你来帮帮他吧。（xhd认为一样学分的课没区别）Input输入数据的第一行是一个数据T，表示有T组数据。每组数据的第一行是两个整数n(1 <= n <= 40 阅读全文

摘要：Ignatius and the Princess IIITime Limit : 2000/1000ms (Java/Other)Memory Limit : 65536/32768K (Java/Other)Total Submission(s) : 2Accepted Submission(s) : 2Font: Times New Roman | Verdana | GeorgiaFont Size: ← →Problem Description"Well, it seems the first problem is too easy. I will let you know 阅读全文

摘要：GraphTime Limit: 2000/1000 MS (Java/Others)Memory Limit: 65768/65768 K (Java/Others)Total Submission(s): 962Accepted Submission(s): 510Problem DescriptionEveryone knows how to calculate the shortest path in a directed graph. In fact, the opposite problem is also easy. Given the length of shortest pa 阅读全文

摘要：PyramidsTime Limit: 1000MSMemory Limit: 65536KTotal Submissions: 2268Accepted: 751Special JudgeDescriptionRecently in Farland, a country in Asia, a famous scientist Mr. Log Archeo has discovered ancient pyramids. But unlike those in Egypt and Central America, they have triangular (not rectangular) f 阅读全文

摘要：WallTime Limit: 1000MSMemory Limit: 10000KTotal Submissions: 21502Accepted: 7048DescriptionOnce upon a time there was a greedy King who ordered his chief Architect to build a wall around the King's castle. The King was so greedy, that he would not listen to his Architect's proposals to build 阅读全文

摘要：RSATime Limit: 2000/1000 MS (Java/Others)Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 706Accepted Submission(s): 524Problem DescriptionRSA is one of the most powerful methods to encrypt data. The RSA algorithm is described as follow:> choose two large prime integer p, q> calcu 阅读全文

摘要：A sequence of numbersTime Limit: 2000/1000 MS (Java/Others)Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 1129Accepted Submission(s): 359Problem DescriptionXinlv wrote some sequences on the paper a long time ago, they might be arithmetic or geometric sequences. The numbers are not ver 阅读全文

摘要：A New Change ProblemTime Limit: 5000/1000 MS (Java/Others)Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 533Accepted Submission(s): 265Problem DescriptionNow given two kinds of coins A and B,which satisfy that GCD(A,B)=1.Here you can assume that there are enough coins for both kinds.P 阅读全文

摘要：Quick out of the HarbourTime Limit: 2000/1000 MS (Java/Others)Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 75Accepted Submission(s): 47Problem DescriptionCaptain Clearbeard decided to go to the harbour for a few days so his crew could inspect and repair the ship. Now, a few days lat 阅读全文

摘要：The Embarrassed CryptographerTime Limit: 2000MSMemory Limit: 65536KTotal Submissions: 9291Accepted: 2403DescriptionThe young and very promising cryptographer Odd Even has implemented the security module of a large system with thousands of users, which is now in use in his company. The cryptographic 阅读全文

摘要：Brackets SequenceTime Limit: 1000MSMemory Limit: 65536KTotal Submissions: 18313Accepted: 5020Special JudgeDescriptionLet us define a regular brackets sequence in the following way: 1. Empty sequence is a regular sequence. 2. If S is a regular sequence, then (S) and [S] are both regular sequences. 3. 阅读全文