回答編集履歴
3
path と visited は同じなので、path を削除
test
CHANGED
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@@ -84,11 +84,11 @@
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84
84
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85
85
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86
86
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87
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-
def dfs(start, visited
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87
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+
def dfs(start, visited):
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88
88
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89
89
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if len(visited) == n:
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90
90
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91
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-
ans.append(
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91
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+
ans.append(visited)
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92
92
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93
93
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else:
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94
94
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@@ -96,7 +96,7 @@
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96
96
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97
97
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if c not in visited:
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98
98
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99
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-
dfs(c, visited + [c]
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99
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+
dfs(c, visited + [c])
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100
100
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101
101
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102
102
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@@ -118,7 +118,7 @@
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118
118
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119
119
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ans = []
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120
120
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121
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-
dfs(1, [1]
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121
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+
dfs(1, [1])
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122
122
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123
123
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print(len(ans))
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124
124
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2
説明の修正
test
CHANGED
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@@ -20,7 +20,7 @@
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20
20
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21
21
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3 4
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22
22
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23
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-
この場合、[1, 2,
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23
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+
この場合、[1, 2, 4, 3] または [1, 3, 4, 2] の 2通りになるはずなのに、
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24
24
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25
25
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質問のコードではそうなりません。
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26
26
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1
パスを表示するコードを追加
test
CHANGED
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@@ -73,3 +73,55 @@
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73
73
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print(len(ans))
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74
74
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75
75
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```
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76
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+
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77
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+
**追記**
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78
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+
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79
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+
次のようにすると、見つかったすべてのパスを表示できます。
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80
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+
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81
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+
```Python
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82
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+
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83
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+
from collections import defaultdict
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84
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+
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85
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+
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86
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+
|
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87
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+
def dfs(start, visited, path):
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88
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+
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89
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+
if len(visited) == n:
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90
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+
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91
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+
ans.append(path)
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92
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+
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93
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else:
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94
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+
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95
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+
for c in graph[start]:
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96
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+
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97
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+
if c not in visited:
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98
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+
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99
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+
dfs(c, visited + [c], path + [c])
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100
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+
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101
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+
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102
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+
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103
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+
n, m = map(int, input().split())
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104
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+
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105
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+
tree = defaultdict(list)
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106
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+
|
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107
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+
for _ in range(m):
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108
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+
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109
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+
a, b = map(int, input().split())
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110
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+
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111
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+
tree[a].append(b)
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112
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+
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113
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+
tree[b].append(a)
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114
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+
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115
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+
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116
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+
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117
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+
graph = dict(tree)
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118
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+
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119
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+
ans = []
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120
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+
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121
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+
dfs(1, [1], [1])
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122
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+
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123
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+
print(len(ans))
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124
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+
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125
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+
print(ans)
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126
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+
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127
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+
```
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