摘要：Problem Description A number whose only prime factors are 2,3,5 or 7 is called a humble number. The sequence 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 1... 阅读全文

摘要：Problem Description JGShining's kingdom consists of 2n(n is no more than 500,000) small cities which are located in two parallel lines. Half of ... 阅读全文

摘要：description 给出一个整数N，将N表示为2个整数i j的平方和（i <= j)，如果有多种表示，按照i的递增序输出。例如：N = 130，130 = 3^2 + 11^2 = 7^2 + 9^2 （注：3 11同11 3算1种） input ... 阅读全文

摘要：description 有一个包含n+2个元素的序列(a[0],a[1],…,a[n+1])。我们知道，对于任意的i(i=1,2,...,n),满足a[i]=(a[i-1]+a[i+1])/2-c[i]。给定a[0],a[n+1],c[0],c[1],...c[n],你的任务是... 阅读全文