View Compilation Error

0_0_16817882_30192.cpp:2:4: error: stray '#' in program
  2 #include <stdio.h>
    ^
0_0_16817882_30192.cpp:3:4: error: stray '#' in program
  3 #include <string.h>
    ^
0_0_16817882_30192.cpp:4:4: error: stray '#' in program
  4 #include <math.h>
    ^
0_0_16817882_30192.cpp:2:2: error: expected unqualified-id before numeric constant
  2 #include <stdio.h>
  ^
0_0_16817882_30192.cpp:7:2: error: expected unqualified-id before numeric constant
  7 const int maxn = 0x7fffffff ;
  ^
0_0_16817882_30192.cpp:8:2: error: expected unqualified-id before numeric constant
  8 
  ^
0_0_16817882_30192.cpp:10:1: error: expected unqualified-id before numeric constant
 10 
 ^