View Compilation Error

0_0_17633680_18525.cpp:2:4: error: stray '#' in program
 02.#include<cmath>  
    ^
0_0_17633680_18525.cpp:3:4: error: stray '#' in program
 03.#include<algorithm>  
    ^
0_0_17633680_18525.cpp:2:1: error: expected unqualified-id before numeric constant
 02.#include<cmath>  
 ^
0_0_17633680_18525.cpp:5:1: error: expected unqualified-id before numeric constant
 05.typedef long long ll;  
 ^
0_0_17633680_18525.cpp:6:1: error: expected unqualified-id before numeric constant
 06.const int mod = 1e9+7;  
 ^
0_0_17633680_18525.cpp:7:1: error: expected unqualified-id before numeric constant
 07.ll sum(ll a,ll b){  
 ^
0_0_17633680_18525.cpp:13:1: error: expected unqualified-id before numeric constant
 13.int main(){  
 ^