Compilare: user.cpp: In function ‘void BuildTree()’: user.cpp:65:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0; i<Answer.size(); i++) ~^~~~~~~~~~~~~~ user.cpp: In function ‘bool Check(int, int, bool, int)’: user.cpp:76:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0; i<Answer[Index].size(); i++) { ~^~~~~~~~~~~~~~~~~~~~~ user.cpp: In function ‘int DPBiconex(int, int, bool)’: user.cpp:88:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0; i<Answer[Index].size(); i++) ~^~~~~~~~~~~~~~~~~~~~~ user.cpp: In function ‘void FindSol(int, int, int, bool)’: user.cpp:145:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0; i<Answer[Biconex(Index)].size(); i++) ~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~