Compilare: main.cpp: In function 'int dfs(int)': main.cpp:18:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<muchii[nod].size();++j) ~^~~~~~~~~~~~~~~~~~~ main.cpp:35:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^ main.cpp: In function 'int main()': main.cpp:51:22: warning: suggest parentheses around assignment used as truth value [-Wparentheses] if(mexx[i]=-1) ^