View Compilation Error

0_0_12810918_18225.cpp:1:24: bits/stdc++.h: No such file or directory
0_0_12810918_18225.cpp:16: error: `acos' was not declared in this scope
0_0_12810918_18225.cpp: In function `int work(int, int)':
0_0_12810918_18225.cpp:28: error: `min' undeclared (first use this function)
0_0_12810918_18225.cpp:28: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_12810918_18225.cpp: In function `int main()':
0_0_12810918_18225.cpp:36: error: `scanf' undeclared (first use this function)
0_0_12810918_18225.cpp:39: error: `printf' undeclared (first use this function)