摘要：
There is an equation ax + by + c = 0. Given a,b,c,x1,x2,y1,y2 you must determine, how many integer roots of this equation are satisfy ... 阅读全文
摘要：
Given the N integers, you have to find the maximum GCD (greatest common divisor) of every possiblepair of these integers.InputThe firs... 阅读全文