View Compilation Error

0_0_33575645_28501.c:1:1: error: expected identifier or '(' before '/' token
 //#pragma GCC optimize(3)
 ^
0_0_33575645_28501.c:1:3: error: stray '#' in program
 //#pragma GCC optimize(3)
   ^
0_0_33575645_28501.c:2:25: fatal error: bits/stdc++.h: No such file or directory
 #include <bits/stdc++.h>
                         ^
compilation terminated.