Compilare: main.cpp: In function 'void dfs(int)': main.cpp:23:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < l[x].size(); i++) ~~^~~~~~~~~~~~~ main.cpp: In function 'void dfs2(int)': main.cpp:37:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < l[x].size(); i++) ~~^~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:99:14: warning: 'rad' may be used uninitialized in this function [-Wmaybe-uninitialized] dfs2(rad); ^ main.cpp:88:13: warning: 'nod' may be used uninitialized in this function [-Wmaybe-uninitialized] dfs(nod); ^