Compilare: main.cpp: In function 'void dfs(int, std::__cxx11::list<int>*, int*)': main.cpp:18:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(ad[child].size()<k) ~~~~~~~~~~~~~~~~^~ main.cpp:17:11: warning: suggest explicit braces to avoid ambiguous 'else' [-Wparentheses] if(visited[child] == 0) ^ main.cpp: In function 'int main()': main.cpp:54:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(ad[i].size() <k ) ~~~~~~~~~~~~~^~ main.cpp:34:13: warning: unused variable 'start' [-Wunused-variable] int n,m,start; ^~~~~