Compilare: main.cpp: In function 'void DFS(int)': main.cpp:14:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<A[u].size();i++){ ~^~~~~~~~~~~~ main.cpp: In function 'void DFS2(int)': main.cpp:34:8: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(l+1==MC.size()){ ~~~^~~~~~~~~~~ main.cpp:41:15: 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:64:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<MC.size();i++){ ~^~~~~~~~~~ main.cpp:68:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<MC.size();i++){ ~^~~~~~~~~~ main.cpp:72:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<MC.size();j++)V[MC[j]]=0; ~^~~~~~~~~~ main.cpp:75:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<MC.size();i++){ ~^~~~~~~~~~ main.cpp:67:6: warning: unused variable 'i' [-Wunused-variable] int i=0,p=0; ^ main.cpp:67:10: warning: unused variable 'p' [-Wunused-variable] int i=0,p=0; ^