Compilare: user.cpp:14:20: warning: suggest parentheses around ‘+’ inside ‘<<’ [-Wparentheses] vector <short> V[(1<<20+5)],Sol; ^ user.cpp: In function ‘void buildG()’: user.cpp:42:44: warning: variable ‘initial’ set but not used [-Wunused-but-set-variable] int val=(Attack[j].second | i),initial; ^ user.cpp: In function ‘void Dijkstra()’: user.cpp:117:43: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<G[node.second].size();i++) ^ user.cpp:132:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<G[Link[i]].size();j++) ^