Compilare: user.cpp: In function ‘void First_DFS(int)’: user.cpp:44:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<G[node].size(); ++i) ^ user.cpp: In function ‘void Second_DFS(int)’: user.cpp:56:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<G_t[node].size(); ++i) ^ user.cpp: In function ‘void Compute_Comprimated_Graph()’: user.cpp:90:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0; j<G[i].size(); ++j) ^ user.cpp:101:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=1; i<=ctc.size(); ++i) ^ user.cpp:103:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0; j<G_ctc[i].size(); ++j) ^ user.cpp:111:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=1; i<=ctc.size(); ++i) ^ user.cpp: In function ‘void Find_Resault()’: user.cpp:122:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<ctc.size(); ++i) ^