Compilare: user.cpp: In function ‘bool BF()’: user.cpp:60:42: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < L[node].size(); i++) { ^ user.cpp: In function ‘bool cupleaza(int)’: user.cpp:174:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < L[node].size(); i++) { ^ user.cpp:189:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < L[node].size(); i++) { ^