Eroare de compilare: main.cpp: In function 'int main()': main.cpp:103:9: error: 'cin' was not declared in this scope 103 | cin.tie(NULL); | ^~~ main.cpp:4:1: note: 'std::cin' is defined in header '<iostream>'; did you forget to '#include <iostream>'? 3 | #include <vector> +++ |+#include <iostream> 4 | main.cpp:105:15: warning: unused variable 'z' [-Wunused-variable] 105 | int x, y, z; | ^ main.cpp:108:11: warning: unused variable 'w2' [-Wunused-variable] 108 | edge2 w2; | ^~ Non zero exit status: 1