Problem	yunah
User	WJR
Submission Time	2025-07-26 20:27:53
Score	0
Max Time	N/A
Max Memory	N/A

Compile Error

yunah.cpp: In function ‘int main()’:
yunah.cpp:5:5: error: ‘cin’ was not declared in this scope
5 | cin >> n >> k;
| ^~~
yunah.cpp:1:1: note: ‘std::cin’ is defined in header ‘<iostream>’; did you forget to ‘#include <iostream>’?
+++ |+#include <iostream>
1 | using namespace std;
yunah.cpp:6:5: error: ‘unordered_set’ was not declared in this scope
6 | unordered_set<int> no_friends;
| ^~~~~~~~~~~~~
yunah.cpp:1:1: note: ‘std::unordered_set’ is defined in header ‘<unordered_set>’; did you forget to ‘#include <unordered_set>’?
+++ |+#include <unordered_set>
1 | using namespace std;
yunah.cpp:6:19: error: expected primary-expression before ‘int’
6 | unordered_set<int> no_friends;
| ^~~
yunah.cpp:10:9: error: ‘no_friends’ was not declared in this scope
10 | no_friends.insert(x);
|