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040000 tree 516b644e3872d053cf9acae8548b4249d3de8c1c	cstdlib
040000 tree 90f70e9973c68cfb7d59b7f85b5676b4ba9b5c6e	cstring
040000 tree 7b8a3a2d8201bb07221f2b7433b1da7dd3f17dce	ctime
040000 tree fbd0a2daf04e16a1fa72b1cf3c8be7729db5943c	functional
040000 tree c87386c0125f53c32b2e2c9c84bdd58fac39d0df	memory
040000 tree 2979115cf37291ca9e5eef87211f1ab3dc8f7f22	type_traits
040000 tree 2e0def93c66761eb83e7806d105247f4a199dc94	utility