描述Most positive integers may be written as a sum of a sequence of at least two consecutive positive integers. For instance,6 = 1 + 2 + 39 = 5 + 4 = 2 + 3 + 4but 8 cannot be so written. Write a program which will compute how many different ways an
題目大意:輸入一個偶數,要求解出其為兩個素數的加法,且兩個數素數的差最大,如果沒有則輸出"Goldbach's conjecture is wrong." 每一個大於4的數都能拆分成兩個質數相加用篩法打表1000000的素數,再依次暴力判斷 描述In 1742, Christian Goldbach, a German amateur mathematician, sent a letter to Leonhard Euler in which he made the following
Currency ExchangeTime Limit: 1000MS Memory Limit: 30000KTotal Submissions: 7392 Accepted: 2357DescriptionSeveral currency exchange points are working in our city. Let us suppose that each point specializes in two particular currencies and performs
Agri-NetTime Limit: 1000MS Memory Limit: 10000KTotal Submissions: 16227 Accepted: 6601DescriptionFarmer John has been elected mayor of his town! One of his campaign promises was to bring internet connectivity to all farms in the area. He needs your
ROADSTime Limit: 1000MS Memory Limit: 65536KTotal Submissions: 4339 Accepted: 1538DescriptionN cities named with numbers 1 ... N are connected with one-way roads. Each road has two parameters associated with it : the road length and the toll that