View Compilation Error

0_0_37566968_8477.c:1:1: error: expected identifier or '(' before '/' token
 //#pragma GCC optimize(2)
 ^
0_0_37566968_8477.c:1:3: error: stray '#' in program
 //#pragma GCC optimize(2)
   ^
0_0_37566968_8477.c:2:24: fatal error: bits/stdc++.h: No such file or directory
 #include<bits/stdc++.h>
                        ^
compilation terminated.