Compilare: main.cpp: In function 'int dfs(int, int)': main.cpp:22:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(pt[nod]<muchii[nod].size()) ~~~~~~~^~~~~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:130:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(ans==lft.size()) ~~~^~~~~~~~~~~~