Compilare: main.cpp: In function 'void DFS(int)': main.cpp:15:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<A[u].size();i++){ ~^~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:47:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<CTC.size();i++){ ~^~~~~~~~~~~ main.cpp:51:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<CTC.size();i++){ ~^~~~~~~~~~~ main.cpp:53:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<CTC[i].size();j++){ ~^~~~~~~~~~~~~~