Compilare: user.cpp: In function ‘int comp(muchie, muchie)’: user.cpp:15:34: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses] return (a.ok<b.ok||a.ok==b.ok&&a.c<b.c); ^ user.cpp: In function ‘int main()’: user.cpp:51:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<v[nod].size();i++) ^