41
(2)1
2
(1)
(2)
1(4)
5×5(图2)
42
1
12
A=i+5
5
43
242524n2-1(图1)
3×39AB8
8(图2)1
3×33PQ
4(1)12.13PQ4(2)15.42
45
3×38
1644
162
814
1622
41
41
41
82
76
46
ABAC
47
CCACBCBCAC90ACBC
48
(1)A→C→E→B→D→A→B→C→D→E→A
A→B→C→D→A→C→E→B→D→E→A
(2)(traversability)43
18(Eu-ler)(Knigsbergbridges)(RiverPregel)717
ABCDBCD3A5(图2)
()4
33-P123P1P23P()ABAB
49
598
50
15
41
(2)1
2
(1)
(2)
1(4)
5×5(图2)
42
1
12
A=i+5
5
43
242524n2-1(图1)
3×39AB8
8(图2)1
3×33PQ
4(1)12.13PQ4(2)15.42
45
3×38
1644
162
814
1622
41
41
41
82
76
46
ABAC
47
CCACBCBCAC90ACBC
48
(1)A→C→E→B→D→A→B→C→D→E→A
A→B→C→D→A→C→E→B→D→E→A
(2)(traversability)43
18(Eu-ler)(Knigsbergbridges)(RiverPregel)717
ABCDBCD3A5(图2)
()4
33-P123P1P23P()ABAB
49
598
50
15