View Compilation Error

0_0_12984835_17621.cpp:1:24: bits/stdc++.h: No such file or directory
0_0_12984835_17621.cpp:18: error: `acos' was not declared in this scope
0_0_12984835_17621.cpp: In function `void prep()':
0_0_12984835_17621.cpp:29: error: `memcpy' undeclared (first use this function)
0_0_12984835_17621.cpp:29: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_12984835_17621.cpp:33: error: `max' undeclared (first use this function)
0_0_12984835_17621.cpp: In function `int main()':
0_0_12984835_17621.cpp:42: error: `scanf' undeclared (first use this function)
0_0_12984835_17621.cpp:44: error: `strlen' undeclared (first use this function)
0_0_12984835_17621.cpp:46: error: `memset' undeclared (first use this function)
0_0_12984835_17621.cpp:49: error: `memcpy' undeclared (first use this function)
0_0_12984835_17621.cpp:60: error: `printf' undeclared (first use this function)