Compilare: user.cpp: In function ‘void citire()’: user.cpp:18:13: warning: unused variable ‘x’ [-Wunused-variable] int x, y; ^ user.cpp:18:16: warning: unused variable ‘y’ [-Wunused-variable] int x, y; ^ user.cpp: In function ‘void solve()’: user.cpp:95:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < G[el].size(); i++) ^ user.cpp:109:26: warning: variable ‘allFalse’ set but not used [-Wunused-but-set-variable] bool allTrue = true, allFalse = true; ^ user.cpp: In function ‘int find_parents(int)’: user.cpp:36:1: warning: control reaches end of non-void function [-Wreturn-type] } ^