Compilare: main.cpp: In function 'void back(int)': main.cpp:50:33: warning: unused variable 'vi' [-Wunused-variable] 50 | int vi=v[i].i,vj=v[i].j; | ^~ main.cpp:50:43: warning: unused variable 'vj' [-Wunused-variable] 50 | int vi=v[i].i,vj=v[i].j; | ^~ main.cpp:49:73: warning: 'ind' may be used uninitialized [-Wmaybe-uninitialized] 49 | if(a[ni][nj]==1&&a[ni+di[l]][nj+dj[l]]==0&&v[ind].viu==true){ | ^ main.cpp:41:25: note: 'ind' was declared here 41 | int ind; | ^~~