E N D
1. ??? ?????? 4.1 ????
4.2?????????
4.3???????
4.4??????
2. 4.1 ???? ?G=(V,E),??:V= v1,v2,,vn
E= e1,e2,,en
28. 4.4 ?????
39. ?:(1)???????f=0, ?????v1?v7?????
40. (2)????f=1,??????????????
45. (7)?????? f=11
46. ?????????
47. ??????????
48. ??????x24?x34
49. ?x24????z24-c24 ????
50. ?x34????z34 -c34 ????
51. ??x34??,??????
52. ??????x24?x56
53. ??x24?x56????z24 -c24 ?z56-c56
54. ???