Description: A tree, a tree caterpillar. It in the tree of life for a long time, it constructed well aware. In the trees, it has always been to go the shortest path, not a detour. It is also particularly like the triangle, so when it was crawling around in the trees always thinking, if just climbed a few branches/trunk sawed off, you can select from three out makes up a triangle ?
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树上的三角形.cpp
树上的三角形.exe