给出了用其整系数线性组合表示两个正整数的最大公约数的计算机程序。
A computer program for expressing the greatest common divisor of two positive integers using their linear combination is given here.
给出一个正整数和负整数组成的立方体，找出其中具有最大和的子立方体。
Given a cube of positive and negative integers, find the sub-cube with the largest sum. The sum of a cube is the sum of all the elements in that cube.
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