Compilare: user.cpp: In function ‘void dfs(int)’: user.cpp:49:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0;i<L[nod].size();i++) { ^ user.cpp:264:25: warning: statement has no effect [-Wunused-value] X[nod].u[0] == 1; ^ user.cpp: In function ‘void dfs1(int)’: user.cpp:305:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0;i<L[nod].size();i++) { ^ user.cpp:301:9: warning: variable ‘f’ set but not used [-Wunused-but-set-variable] int f[2], fius, fiud; ^ user.cpp:301:15: warning: unused variable ‘fius’ [-Wunused-variable] int f[2], fius, fiud; ^ user.cpp:301:21: warning: unused variable ‘fiud’ [-Wunused-variable] int f[2], fius, fiud; ^