Составим матрицу
X1
X2
X3
X4
X5
X6
X7
X8
X9
X10
X11
X12
X13
X1
0
3
7
X2
0
2
1
X3
0
1
2
4
X4
0
1
1
X5
0
1
2
X6
0
2
2
X7
0
1
1
2
X8
0
2
X9
0
3
X10
0
1
1
X11
6
X12
0
5
X13
0
X1
X2
X3
X4
X5
X6
X7
X8
X9
X10
X11
X12
X13
X1
X1 X2
X1 X3
X2
X2 X4
X2 X5
X3
X3 X5
X3 X6
X3 X7
X4
X4 X8
X4 X11
X5
X5 X8
X5 X9
X6
X6 X10
X6 X11
X7
X7 X8
X7 X9
X7 X10
X8
X8 X11
X9
X9 X12
X10
X10 X11
X10 X12
X11
X11 X13
X12
X12 X13
X13
Составим матрицу
|
X1 |
X2 |
X3 |
X4 |
X5 |
X6 |
X7 |
X8 |
X9 |
X10 |
X11 |
X12 |
X13 |
X1 |
0 |
3 |
7 |
|
|
|
|
|
|
|
|
|
|
X2 |
|
0 |
|
2 |
1 |
|
|
|
|
|
|
|
|
X3 |
|
|
0 |
|
1 |
2 |
4 |
|
|
|
|
|
|
X4 |
|
|
|
0 |
|
|
|
1 |
|
|
1 |
|
|
X5 |
|
|
|
|
0 |
|
|
1 |
2 |
|
|
|
|
X6 |
|
|
|
|
|
0 |
|
|
|
2 |
2 |
|
|
X7 |
|
|
|
|
|
|
0 |
1 |
1 |
2 |
|
|
|
X8 |
|
|
|
|
|
|
|
0 |
|
|
2 |
|
|
X9 |
|
|
|
|
|
|
|
|
0 |
|
|
3 |
|
X10 |
|
|
|
|
|
|
|
|
|
0 |
1 |
1 |
|
X11 |
|
|
|
|
|
|
|
|
|
|
|
|
6 |
X12 |
|
|
|
|
|
|
|
|
|
|
|
0 |
5 |
X13 |
|
|
|
|
|
|
|
|
|
|
|
|
0 |
|
X1 |
X2 |
X3 |
X4 |
X5 |
X6 |
X7 |
X8 |
X9 |
X10 |
X11 |
X12 |
X13 |
X1 |
|
X1 X2 |
X1 X3 |
X1 X2X4 |
X1 X2X5 |
|
|
|
|
|
|
|
|
X2 |
|
|
|
X2 X4 |
X2 X5 |
|
|
|
|
|
|
|
|
X3 |
|
|
|
|
X3 X5 |
X3 X6 |
X3 X7 |
|
|
|
|
|
|
X4 |
|
|
|
|
|
|
|
X4 X8 |
|
|
X4 X11 |
|
|
X5 |
|
|
|
|
|
|
|
X5 X8 |
X5 X9 |
|
|
|
|
X6 |
|
|
|
|
|
|
|
|
|
X6 X10 |
X6 X11 |
|
|
X7 |
|
|
|
|
|
|
|
X7 X8 |
X7 X9 |
X7 X10 |
|
|
|
X8 |
|
|
|
|
|
|
|
|
|
|
X8 X11 |
|
|
X9 |
|
|
|
|
|
|
|
|
|
|
|
X9 X12 |
|
X10 |
|
|
|
|
|
|
|
|
|
|
X10 X11 |
X10 X12 |
|
X11 |
|
|
|
|
|
|
|
|
|
|
|
|
X11 X13 |
X12 |
|
|
|
|
|
|
|
|
|
|
|
|
X12 X13 |
X13 |
|
|
|
|
|
|
|
|
|
|
|
|
|