View Compilation Error

0_0_12993638_16746.cpp: In member function `void Link_Cut_Tree::push_up(int)':
0_0_12993638_16746.cpp:90: error: `max' undeclared (first use this function)
0_0_12993638_16746.cpp:90: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_12993638_16746.cpp: In member function `void Link_Cut_Tree::push_down(int)':
0_0_12993638_16746.cpp:111: error: `swap' undeclared (first use this function)