View Compilation Error

0_0_39447858_29656.cpp: In function 'void solve()':
0_0_39447858_29656.cpp:90:9: error: 'memset' was not declared in this scope
   90 |         memset(dp, -1, sizeof dp);
      |         ^~~~~~
0_0_39447858_29656.cpp:6:1: note: 'memset' is defined in header '<cstring>'; did you forget to '#include <cstring>'?
    5 | #include<algorithm>
  +++ |+#include <cstring>
    6 | using namespace std;