P4878 [USACO05DEC] Layout G

14组数据，前10组为原数据，后4组为hack数据

Like everyone else, cows like to stand close to their friends when queuing for feed. FJ has N (2

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Explanation of the sample: There are 4 cows. Cows #1 and #3 must be no more than 10 units apart, cows #2 and #4 must be no more than 20 units apart, and cows #2 and #3 dislike each other and must be no fewer than 3 units apart. The best layout, in terms of coordinates on a number line, is to put cow #1 at 0, cow #2 at 7, cow #3 at 10, and cow #4 at 27.