Compilare: user.cpp: In function ‘void bfs()’: user.cpp:22:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < V[top].size(); i ++) { ^ user.cpp: In function ‘int main()’: user.cpp:55:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < aux.size(); i ++) { ^ user.cpp:75:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < aux.size(); i ++) g << aux[i] << "\n"; ^ user.cpp: In function ‘void DFS(int)’: user.cpp:88:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < V[node].size(); i ++) { ^ user.cpp: In function ‘void DFS2(int)’: user.cpp:96:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < V[node].size(); i ++) { ^