View Compilation Error

0_0_39842869_29678.cpp: In function 'int main()':
0_0_39842869_29678.cpp:17:30: error: 'strlen' was not declared in this scope
   17 |                 int n = (int)strlen(s + 1);
      |                              ^~~~~~
0_0_39842869_29678.cpp:4:1: note: 'strlen' is defined in header '<cstring>'; did you forget to '#include <cstring>'?
    3 | #include <iostream>
  +++ |+#include <cstring>
    4 |