View Compilation Error

0_0_39374508_21781.cpp: In function 'int main()':
0_0_39374508_21781.cpp:18:17: error: 'memset' was not declared in this scope
   18 |                 memset(mp1,0,sizeof(mp1));
      |                 ^~~~~~
0_0_39374508_21781.cpp:4:1: note: 'memset' is defined in header '<cstring>'; did you forget to '#include <cstring>'?
    3 | #include <algorithm>
  +++ |+#include <cstring>
    4 | #include <string>