View Compilation Error

0_0_4661718_13930.cpp: In function `void push_down(sptree*)':
0_0_4661718_13930.cpp:33: error: `splaytree' undeclared (first use this function)
0_0_4661718_13930.cpp:33: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_4661718_13930.cpp:33: error: `tmp' undeclared (first use this function)