Compilare: user.cpp: In function ‘int main()’: user.cpp:142:14: warning: unused variable ‘ok’ [-Wunused-variable] bool ok=backtrack(nod3,k,nod3.i); ^ user.cpp:113:24: warning: ‘y1’ may be used uninitialized in this function [-Wmaybe-uninitialized] fout<<x1<<" "<<y1<<" "<<cmin-1; ^ user.cpp:113:15: warning: ‘x1’ may be used uninitialized in this function [-Wmaybe-uninitialized] fout<<x1<<" "<<y1<<" "<<cmin-1; ^