Compilare: main.cpp: In function 'int Dfs(int, int)': main.cpp:52:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^ main.cpp: In function 'int main()': main.cpp:113:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<comp.size()&&sol; ++i) { ~^~~~~~~~~~~~ main.cpp:119:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(i+1<comp.size()) ~~~^~~~~~~~~~~~ main.cpp:129:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<path.size(); ++i) { ~^~~~~~~~~~~~