Compilare: user.cpp: In function ‘void bfs(int)’: user.cpp:19:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<G[x].size();i++) ^ user.cpp: In function ‘int main()’: user.cpp:72:42: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses] if(d1[i]==0||d2[i]==0||v[d[i]]==1&&viz[i]==1) ^ user.cpp:64:9: warning: unused variable ‘k’ [-Wunused-variable] int k=0,v[7501]={0}; ^