foo.cc: In function 'int main()':
foo.cc:103:2: error: 'memset' was not declared in this scope
  103 |  memset(dp, 0, sizeof(dp));
      |  ^~~~~~
foo.cc:5:1: note: 'memset' is defined in header '<cstring>'; did you forget to '#include <cstring>'?
    4 | #include<vector>
  +++ |+#include <cstring>
    5 | using namespace std;

[Hydro](https://hydro.ac)提供评测服务