Problem Statement

You are given a weighted simple connected undirected graph with N vertices and M edges, where vertices are numbered 1 to N, and edges are numbered 1 to M. Additionally, a positive integer K is given.
Edge i\ $(1\leq i\leq M) connects vertices u_i$ and v_i and has a weight of w_i.
For a spanning tree T of this graph, the cost of T is defined as the sum, modulo K, of the weights of the edges in T.
Find the minimum cost of a spanning tree of this graph.

Input

The input is given from Standard Input in the following format:
N M K
u_1 v_1 w_1
u_2 v_2 w_2
$\vdots$
u_M v_M w_M

Output

Print the answer.

Constraints

• $2\leq N\leq8$
• $N-1\leq M\leq\dfrac{N(N-1)}2$
• $1\leq K\leq10^{15}$
• $1\leq u_i\lt v_i\leq N$\ $(1\leq i\leq M)$
• $0\leq w_i\lt K$\ $(1\leq i\leq M)$
• The given graph is simple and connected.
• All input values are integers.

Sample Input 1

5 6 328
1 2 99
1 3 102
2 3 86
2 4 94
2 5 95
3 4 81

Sample Output 1

33

The given graph is shown below:

The cost of the spanning tree containing edges 1,3,5,6 is $(99+86+81+95)\bmod{328}=361\bmod{328}=33$.
The cost of every spanning tree of this graph is at least 33, so print 33.

Sample Input 2

6 5 998244353
1 2 337361568
1 6 450343304
2 3 61477244
2 5 745383438
4 5 727360840

Sample Output 2

325437688

Print the cost of the only spanning tree of this graph, which is 325437688.

Sample Input 3

8 28 936294041850197
1 2 473294720906780
1 3 743030800139244
1 4 709363019414774
1 5 383643612490312
1 6 557102781022861
1 7 623179288538138
1 8 739618599410809
2 3 857687812294404
2 4 893923168139714
2 5 581822471860662
2 6 740549363586558
2 7 307226438833222
2 8 447399029952998
3 4 636318083622768
3 5 44548707643622
3 6 307262781240755
3 7 12070267388230
3 8 700247263184082
4 5 560567890325333
4 6 704726113717147
4 7 588263818615687
4 8 549007536393172
5 6 779230871080408
5 7 825982583786498
5 8 713928998174272
6 7 751331074538826
6 8 449873635430228
7 8 11298381761479

Sample Output 3

11360716373

Note that the input and the answer may not fit into $a 32\operatorname{bit}$ integer.

见题面 Input 部分

见题面 Output 部分