Eroare de compilare: main.cpp: In function 'int main()': main.cpp:26:5: error: 'set' was not declared in this scope 26 | set<int> seen; | ^~~ main.cpp:6:1: note: 'std::set' is defined in header '<set>'; did you forget to '#include <set>'? 5 | #include <queue> +++ |+#include <set> 6 | main.cpp:26:9: error: expected primary-expression before 'int' 26 | set<int> seen; | ^~~ main.cpp:27:5: error: 'seen' was not declared in this scope 27 | seen.insert(0); | ^~~~ Non zero exit status: 1