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:34:6: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(l==MC.size()){ ~^~~~~~~~~~~ main.cpp:40:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<A[u].size();i++){ ~^~~~~~~~~~~~ main.cpp:45:8: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(l==MC.size()){ ~^~~~~~~~~~~ main.cpp:46:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<A[v].size();j++){ ~^~~~~~~~~~~~ main.cpp:44:8: warning: unused variable 'k' [-Wunused-variable] int k; ^ main.cpp: In function 'int main()': main.cpp:75:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<MC.size();i++){ ~^~~~~~~~~~ main.cpp:78:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<MC.size();i++){ ~^~~~~~~~~~ main.cpp:83:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<MC.size();i++){ ~^~~~~~~~~~