Compilare: main.cpp: In function 'void dfs(int)': main.cpp:34:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=1;i<=goback&&par[aux]!=0;i++) ~^~~~~~~~ main.cpp:38:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(i==goback) ~^~~~~~~~ main.cpp: In function 'int main()': main.cpp:95:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(dist<=goback) ~~~~^~~~~~~~