Compilare: main.cpp: In function 'void dfs(int)': main.cpp:29:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < l[rad].size(); i++) ~~^~~~~~~~~~~~~~~ main.cpp:41:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < l[rad].size(); i++) ~~^~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:77:9: warning: 'rad' may be used uninitialized in this function [-Wmaybe-uninitialized] int rad; ^~~