Compilare: main.cpp: In function 'void dfs(int)': main.cpp:21:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<c[nod].size();i++) ~^~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:53:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<c[srt[i]].size();j++) ~^~~~~~~~~~~~~~~~~ main.cpp:65:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<b[srt[i]].size();j++) ~^~~~~~~~~~~~~~~~~