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分組問題, 1, 3, 7, 15, 31 - Coggle Diagram
分組問題
5
1
12
124
1245
125
123
1234
12345
1235
13
134
1345
135
14
145
15
2
23
234
2345
235
24
245
25
3
34
345
35
4
45
5
4
1
14
13
134
12
123
1234
124
2
23
234
24
3
34
4
3
1
12
123
13
2
23
3
2
1
12
2
1
1
1
3
7
15
31