Compilare: user.cpp: In function ‘void DFST(int)’: user.cpp:27:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0 ; i < GT[x].size(); ++i) ^ user.cpp: In function ‘void DFS(int)’: user.cpp:37:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0 ; i < G[x].size(); ++i) ^ user.cpp: In function ‘int main()’: user.cpp:63:41: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0; j < Gsol[i].size(); ++j) ^