一个大正方体能不能拆成39个小正方体?
34个的如下:
+-------+-------+-------+
/ / / /|
/ / / / |
/ / / / |
+-------+-------+-------+ |
/ / / /| |
/ / / / | +
/ / / / | /|
+-------+-------+---+---+ | / |
/ / / / /| |/ |
/ / +---+---+ | + |
/ / / / /| + /| |
+-------+-------+---+---+ |/| / | +
| | | | | + |/ | /|
| | | | |/| + | / |
| | +---+---+ |/| |/ |
| | | | | + | + |
| | | | |/ | /| |
+-------+-------+---+---+ | / | +
| | | | |/ | /
| | | | + | /
| | | | /| |/
| | | | / | +
| | | |/ | /
+-------+-------+-------+ | /
| | | | |/
| | | | +
| | | | /
| | | | /
| | | |/
+-------+-------+-------+