View Compilation Error

0_0_38613257_23947.cpp: In function 'int solve()':
0_0_38613257_23947.cpp:32:5: error: 'memset' was not declared in this scope
     memset(B, 0, sizeof(B));
     ^~~~~~
0_0_38613257_23947.cpp:32:5: note: 'memset' is defined in header '<cstring>'; did you forget to '#include <cstring>'?
0_0_38613257_23947.cpp:7:1:
+#include <cstring>
 
0_0_38613257_23947.cpp:32:5:
     memset(B, 0, sizeof(B));
     ^~~~~~