Compilare: main.cpp: In function 'int dfs(int, int&)': main.cpp:47:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^ main.cpp: In function 'int main()': main.cpp:100:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(vec[i].size()<k&&vec[i].size()!=0) { ~~~~~~~~~~~~~^~