Compilare: main.cpp: In function 'void dfs(int, int)': main.cpp:21:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<nod[pos].size();i++) ~^~~~~~~~~~~~~~~~ main.cpp: In function 'void go_visit(int, int, int, int)': main.cpp:37:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<nod[pos].size();i++) ~^~~~~~~~~~~~~~~~ main.cpp:38:11: warning: suggest explicit braces to avoid ambiguous 'else' [-Wparentheses] if(nod[pos][i]!=last) ^