View Compilation Error

0_0_38688430_18702.cpp: In function 'void bfs(int)':
0_0_38688430_18702.cpp:19:5: error: 'memset' was not declared in this scope
   19 |     memset(dis,0,sizeof(dis));
      |     ^~~~~~
0_0_38688430_18702.cpp:5:1: note: 'memset' is defined in header '<cstring>'; did you forget to '#include <cstring>'?
    4 | #include <algorithm>
  +++ |+#include <cstring>
    5 | using namespace std;
0_0_38688430_18702.cpp: In function 'void init()':
0_0_38688430_18702.cpp:56:5: error: 'memset' was not declared in this scope
   56 |     memset(head,-1,sizeof(head));
      |     ^~~~~~
0_0_38688430_18702.cpp:56:5: note: 'memset' is defined in header '<cstring>'; did you forget to '#include <cstring>'?
0_0_38688430_18702.cpp: In function 'int main()':
0_0_38688430_18702.cpp:86:33: error: expected ';' before 'else'
   86 |         if(flag) printf("YES\n")//有回路;
      |                                 ^
      |                                 ;
   87 |         else{
      |         ~~~~