View Compilation Error

0_0_38923642_29521.cpp: In function 'void solution()':
0_0_38923642_29521.cpp:21:9: error: 'sort' was not declared in this scope; did you mean 'sqrt'?
   21 |         sort(mi + 1, mi + n + 1, cmp);
      |         ^~~~
      |         sqrt