foo.cc: In function 'int main()':
foo.cc:32:5: error: 'memset' was not declared in this scope
     memset(h, true, sizeof h);
     ^~~~~~
foo.cc:32:5: note: suggested alternative: 'wmemset'
     memset(h, true, sizeof h);
     ^~~~~~
     wmemset

[Hydro](https://hydro.ac)提供评测服务