View Compilation Error

0_0_18067532_18004.cpp: In function 'void prepare()':
0_0_18067532_18004.cpp:3:2: error: 'fact' was not declared in this scope
  fact[0]=d[0]=inv[0]=fact[1]=d[1]=inv[1]=1;
  ^
0_0_18067532_18004.cpp:3:10: error: 'd' was not declared in this scope
  fact[0]=d[0]=inv[0]=fact[1]=d[1]=inv[1]=1;
          ^
0_0_18067532_18004.cpp:3:15: error: 'inv' was not declared in this scope
  fact[0]=d[0]=inv[0]=fact[1]=d[1]=inv[1]=1;
               ^
0_0_18067532_18004.cpp:4:18: error: 'MOD' was not declared in this scope
  for (int i=2;i<=MOD+4;i++)
                  ^