Compilare: user.cpp: In function ‘void DFS(int, int)’: user.cpp:34:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < G[node].size(); i++) ^ user.cpp: In function ‘void DFS2(int, int)’: user.cpp:70:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0; j < G[node].size(); j++) ^ user.cpp:83:41: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0; j < R[node].size(); j++) ^ user.cpp:99:41: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0; j < G[node].size(); j++) ^ user.cpp:105:47: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int k = 0; k < R[neighb].size(); k++) ^