Please subscribe to the official Codeforces channel in Telegram via the link: https://t.me/codeforces_official.
×

Virtual contest is a way to take part in past contest, as close as possible to participation on time. It is supported only ACM-ICPC mode for virtual contests.
If you've seen these problems, a virtual contest is not for you - solve these problems in the archive.
If you just want to solve some problem from a contest, a virtual contest is not for you - solve this problem in the archive.
Never use someone else's code, read the tutorials or communicate with other person during a virtual contest.

No tag edit access

K. Send the Fool Further! (medium)

time limit per test

2 secondsmemory limit per test

256 megabytesinput

standard inputoutput

standard outputThank you for helping Heidi! It is now the second of April, but she has been summoned by Jenny again. The pranks do not seem to end...

In the meantime, Heidi has decided that she does not trust her friends anymore. Not too much, anyway. Her relative lack of trust is manifested as follows: whereas previously she would not be made to visit the same person twice, now she can only be sure that she will not be made to visit the same person more than *k* times. (In the case of Jenny, this includes her first visit in the beginning. The situation from the easy version corresponds to setting *k* = 1.)

This is not as bad as it looks, since a single ticket for a route between two friends allows Heidi to travel between this pair of friends the whole day (in both directions). In other words, once she pays for travel between a pair of friends, all further travels between that pair are free.

How much money will Heidi waste now, in a worst-case scenario?

Input

The first line contains two space-separated integers – the number of friends *n* () and the parameter *k* (1 ≤ *k* ≤ 10^{5}). The next *n* - 1 lines each contain three space-separated integers *u*, *v* and *c* (0 ≤ *u*, *v* ≤ *n* - 1, 1 ≤ *c* ≤ 10^{4}) meaning that *u* and *v* are friends and the cost for traveling between *u* and *v* is *c*.

It is again guaranteed that the social network of the input forms a tree.

Output

Again, output a single integer – the maximum sum of costs of tickets.

Examples

Input

9 3

0 1 1

0 2 1

1 3 2

1 4 2

1 5 2

2 6 3

2 7 3

2 8 3

Output

15

Input

9 5

0 1 1

0 2 1

1 3 2

1 4 2

1 5 2

2 6 3

2 7 3

2 8 3

Output

17

Input

11 6

1 0 7932

2 1 1952

3 2 2227

4 0 9112

5 4 6067

6 0 6786

7 6 3883

8 4 7137

9 1 2796

10 5 6200

Output

54092

Note

In the first example, the worst-case scenario for Heidi is to visit the friends in the following order: 0, 1, 5, 1, 3, 1, 0, 2, 6, 2, 7, 2, 8. Observe that no friend is visited more than 3 times.

Codeforces (c) Copyright 2010-2018 Mike Mirzayanov

The only programming contests Web 2.0 platform

Server time: Dec/17/2018 04:50:25 (d1).

Desktop version, switch to mobile version.

Supported by

User lists

Name |
---|