View Compilation Error

0_0_38834577_518.cpp: In function 'int main()':
0_0_38834577_518.cpp:50:27: error: invalid operands of types 'node [1010]' and 'double' to binary 'operator+'
   50 |                 sort(f, f + n);
      |                         ~ ^ ~
      |                         |   |
      |                         |   double
      |                         node [1010]