foo.cc: In function ‘int main()’:
foo.cc:10:5: error: ‘memset’ was not declared in this scope
   10 |     memset(dp,-inf,sizeof(dp));
      |     ^~~~~~
foo.cc:5:1: note: ‘memset’ is defined in header ‘<cstring>’; this is probably fixable by adding ‘#include <cstring>’
    4 | #include <algorithm>
  +++ |+#include <cstring>
    5 | using namespace std;
foo.cc:17:24: error: ‘sum’ was not declared in this scope
   17 |         for(int j=0;j<=sum[i];j++){
      |                        ^~~