Compilare: user.cpp: In function ‘bool cmp(int, int)’: user.cpp:16:21: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses] return (f[l]==f[r] && l<r || f[l]>f[r]); ^ user.cpp: In function ‘void BFS(int)’: user.cpp:25:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0; i<V[x].size(); i++) { ^ user.cpp: In function ‘void rez(int)’: user.cpp:54:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j=0; j<V[i].size(); j++) { ^ user.cpp:62:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0; i<V2.size(); i++) { ^