Compilare: user.cpp: In function ‘int greedyChoose(int)’: user.cpp:76:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < Arb[k].size(); ++i) { ~~^~~~~~~~~~~~~~~ user.cpp:83:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < Arb[k].size(); ++i) { ~~^~~~~~~~~~~~~~~ user.cpp: In function ‘int optimise(int)’: user.cpp:104:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < Arb[k].size(); ++i) ~~^~~~~~~~~~~~~~~ user.cpp:101:9: warning: variable ‘bestSon’ set but not used [-Wunused-but-set-variable] int bestSon = -1; ^~~~~~~