摘要： Given two positive integers a and b,find suitable X and Y to meet the conditions: X+Y=a Least Common Multiple (X, Y) =bInputInput includes multiple se 阅读全文

摘要： We have a special convex that all points have the same distance to origin point. As you know we can get N segments after linking the origin point and 阅读全文

摘要： A box contains black balls and a single red ball. Alice and Bob draw balls from this box without replacement, alternating after each draws until the r 阅读全文