Compilare: main.cpp: In function 'void dfs(int, int)': main.cpp:33:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0;i<L[nod].size();i++){ ~^~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:163:22: warning: suggest parentheses around operand of '!' or change '&' to '&&' or '!' to '~' [-Wparentheses] if ((!mask&(1<<j))) ^~~~~ main.cpp:179:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j=0;j<comp[i].size();++j){ ~^~~~~~~~~~~~~~~