View Compilation Error

0_0_32284192_17201.cpp:84:15: error: stray '#' in program
     if(p!=fa) #pragma GCC optimize(3,"Ofast","inline")   //G++
               ^
0_0_32284192_17201.cpp: In function 'll dfs(ll, ll, ll)':
0_0_32284192_17201.cpp:84:16: error: 'pragma' was not declared in this scope
     if(p!=fa) #pragma GCC optimize(3,"Ofast","inline")   //G++
                ^
0_0_32284192_17201.cpp:105:54: error: can't define friend function 'operator<' in a local class definition
     bool friend operator < (const node a,const node b)
                                                      ^
0_0_32284192_17201.cpp:105:54: error: friend declaration 'bool operator<(dfs(ll, ll, ll)::node, dfs(ll, ll, ll)::node)' in local class without prior declaration
0_0_32284192_17201.cpp:113:1: error: a function-definition is not allowed here before '{' token
 {
 ^
0_0_32284192_17201.cpp:119:1: error: a function-definition is not allowed here before '{' token
 {
 ^
0_0_32284192_17201.cpp:234:1: error: expected '}' at end of input
 }
 ^