Compilare: user.cpp: In function ‘void TreeDynamic()’: user.cpp:120:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<cycle.size(); ++i) ^ user.cpp: In function ‘void CycleDynamic()’: user.cpp:131:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=1; i<cycle.size(); ++i) ^ user.cpp:141:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=1; i<cycle.size(); ++i) ^