View Compilation Error

0_0_8752776_4802.cpp: In function `void pushup(int)':
0_0_8752776_4802.cpp:24: error: `max' undeclared (first use this function)
0_0_8752776_4802.cpp:24: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_8752776_4802.cpp: In function `int find(int)':
0_0_8752776_4802.cpp:92: error: `lower_bound' undeclared (first use this function)
0_0_8752776_4802.cpp: In function `int main()':
0_0_8752776_4802.cpp:97: error: `scanf' undeclared (first use this function)
0_0_8752776_4802.cpp:106: error: `sort' undeclared (first use this function)
0_0_8752776_4802.cpp:107: error: `unique' undeclared (first use this function)
0_0_8752776_4802.cpp:118: error: `abs' undeclared (first use this function)
0_0_8752776_4802.cpp:123: error: `printf' undeclared (first use this function)