foo.cc: In function 'void solve()':
foo.cc:11:17: error: 'memset' was not declared in this scope
   11 |                 memset(val, 0, sizeof val);
      |                 ^~~~~~
foo.cc:2:1: note: 'memset' is defined in header '<cstring>'; did you forget to '#include <cstring>'?
    1 | #include <iostream>
  +++ |+#include <cstring>
    2 | using namespace std;
foo.cc:22:17: error: 'memset' was not declared in this scope
   22 |                 memset(val, 0, sizeof val);
      |                 ^~~~~~
foo.cc:22:17: note: 'memset' is defined in header '<cstring>'; did you forget to '#include <cstring>'?
foo.cc:34:25: error: 'memset' was not declared in this scope
   34 |                         memset(val, 0, sizeof val);
      |                         ^~~~~~
foo.cc:34:25: note: 'memset' is defined in header '<cstring>'; did you forget to '#include <cstring>'?

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