Compilare: main.cpp: In function 'void dfs(int)': main.cpp:25:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(i==muchii[a].size()-1) ~^~~~~~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:57:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(stiva.size()!=m+1||stiva[stiva.size()-1]!=stiva[0]) ~~~~~~~~~~~~^~~~~ main.cpp:60:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<stiva.size();i++) ~^~~~~~~~~~~~~