View Compilation Error

0_0_36094200_4668.cpp: In function 'int main()':
0_0_36094200_4668.cpp:35:2: error: 'Ln' has not been declared
  Ln::main(g,f,MAXN+1);
  ^
0_0_36094200_4668.cpp:36:2: error: 'Mul' has not been declared
  Mul::main(g,f,h,MAXN+1);
  ^