0_0_38697976_5688.cpp: In function 'int main()':
0_0_38697976_5688.cpp:52:17: error: 'memset' was not declared in this scope
52 | memset(head, -1, sizeof(head));
| ^~~~~~
0_0_38697976_5688.cpp:2:1: note: 'memset' is defined in header '<cstring>'; did you forget to '#include <cstring>'?
1 | #include<iostream>
+++ |+#include <cstring>
2 | using namespace std;
|