Compilare: main.cpp: In function 'void dfs(int, int)': main.cpp:30:33: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 30 | if (v[it].size()>sz) | ~~~~~~~~~~~~^~~ main.cpp:30:34: warning: 'sz' may be used uninitialized [-Wmaybe-uninitialized] 30 | if (v[it].size()>sz) | ^~ main.cpp:14:31: note: 'sz' was declared here 14 | int ok=0,mx=0,ctm=0,which,sz; | ^~