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 'int main()': main.cpp:46:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<MC.size();i++){ ~^~~~~~~~~~ main.cpp:49:6: warning: unused variable 'i' [-Wunused-variable] int i=0,p=0,ap; ^ main.cpp:49:10: warning: unused variable 'p' [-Wunused-variable] int i=0,p=0,ap; ^ main.cpp:49:14: warning: unused variable 'ap' [-Wunused-variable] int i=0,p=0,ap; ^~