Compilare: user.cpp: In function ‘int main()’: user.cpp:269:9: warning: unused variable ‘cnt’ [-Wunused-variable] int cnt = 0; ^ user.cpp: In function ‘void df_quick(int)’: user.cpp:86:50: warning: ‘which2’ may be used uninitialized in this function [-Wmaybe-uninitialized] rootwhichdown[it->first] = which2; ^ user.cpp:89:49: warning: ‘which’ may be used uninitialized in this function [-Wmaybe-uninitialized] rootwhichdown[it->first] = which; ^