View Compilation Error

0_0_39080563_10155.cpp: In function 'int The_Longest_Palindrome()':
0_0_39080563_10155.cpp:23:13: error: 'strlen' was not declared in this scope
   23 |         L = strlen(s);
      |             ^~~~~~
0_0_39080563_10155.cpp:2:1: note: 'strlen' is defined in header '<cstring>'; did you forget to '#include <cstring>'?
    1 | #include<iostream>
  +++ |+#include <cstring>
    2 | #include<string>