Compilare: user.cpp: In function ‘int bfs(int)’: user.cpp:29:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<v[s].size();i++) ^ user.cpp:56:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<v[poz].size();j++) ^ user.cpp:20:19: warning: unused variable ‘k1’ [-Wunused-variable] int a=0,i,k=0,k1=0,k2=0,poz,j; ^