Time limit per test: 0.25 second(s) Memory limit: 65536 kilobytes
input: standard output: standard
There are L stations along a circular railway, numbered 1 through L. Trains travel in both directions, and take 1 minute to get from a station to the neighbouring one (i.e., between 1st and 2nd, between 2nd and 3rd,..., between (L-1)-th and L-th and between L-th and 1-st).
There are n employee's houses along the railway, and n offices, each house or office located near a railway station. You are to establish a one-to-one correspondence between houses and offices in such a way that total travel time (sum of travel times of each employee) is minimized.
The first line of the input file contains two integer numbers, n and L (1 ≤ n ≤ 50000, 2 ≤ L ≤ 109). The second line contains n locations of the employee's houses, and the third line contains n locations of the offices. Each location is an integer number between 1 and L. Some houses or offices or both can be located at the same railway station.
Output the minimal total travel time followed by the description of the one-to-one correspondence. The description should be represented by n numbers (one for each employee, ordered as in the input), denoting the 1-based index of the office assigned to the corresponding employee.
1 2 10
11 12 13
2 3 1
2 5 8 11
6 9 12 3
4 1 2 3
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