View Compilation Error

0_0_25049294_28456.cpp:3:3: error: stray '#' in program
 2.#include <cstring>  
   ^
0_0_25049294_28456.cpp:4:3: error: stray '#' in program
 3.#include <cmath>  
   ^
0_0_25049294_28456.cpp:5:3: error: stray '#' in program
 4.#include <iostream>  
   ^
0_0_25049294_28456.cpp:6:3: error: stray '#' in program
 5.#include <algorithm>  
   ^
0_0_25049294_28456.cpp:3:1: error: expected unqualified-id before numeric constant
 2.#include <cstring>  
 ^
0_0_25049294_28456.cpp:8:1: error: expected unqualified-id before numeric constant
 7.typedef __int64 LL;  
 ^
0_0_25049294_28456.cpp:9:1: error: expected unqualified-id before numeric constant
 8.LL gcd(LL a,LL b)  
 ^
0_0_25049294_28456.cpp:13:1: error: expected unqualified-id before numeric constant
 12.LL lcm(LL a,LL b)  
 ^
0_0_25049294_28456.cpp:17:1: error: expected unqualified-id before numeric constant
 16.int main()  
 ^