View Compilation Error

0_0_38887933_15561.cpp: In function 'int ins()':
0_0_38887933_15561.cpp:18:15: error: 'strlen' was not declared in this scope
   18 |   int p(1), l(strlen(cur));
      |               ^~~~~~
0_0_38887933_15561.cpp:4:1: note: 'strlen' is defined in header '<cstring>'; did you forget to '#include <cstring>'?
    3 | #include <queue>
  +++ |+#include <cstring>
    4 | using namespace std;