/in/foo.cc: In function 'int main()':
/in/foo.cc:8:32: error: expected initializer before '==' token
  long long int n, k, x, y, z, c==0;
                                ^~
/in/foo.cc:26:6: error: 'c' was not declared in this scope
      c = 1;
      ^
/in/foo.cc:31:7: error: 'c' was not declared in this scope
   if (c == 1)
       ^