Compilare: main.cpp:1:2: warning: #import is a deprecated GCC extension [-Wdeprecated] 1 | #import<fstream> | ^~~~~~ main.cpp:2:77: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type] 2 | int x[]={-1,0,1,0},l[1<<15],c[1<<15],a[177][177],b,d,o,q,n,m,k,i,j,v,p,u,*P;main(){std::ifstream f("alee.in");for(f>>n>>m;m--;f>>i>>k,a[i][k]=-1);for(f>>b>>d>>o>>q,i=0;i++<n;*a[i]=a[i][n+1]=a[0][i]=a[n+1][i]=-1);for(a[b][d]=1,l[p]=b,c[p]=d;p<=u&!a[o][q];)for(j=l[p],v=c[p++],k=-1;k++<3;P=&a[j+x[k]][v+x[3-k]],!*P?*P=a[j][v]+1,l[++u]=j+x[k],c[u]=v+x[3-k]:0);std::ofstream("alee.out")<<a[o][q];} | ^~~~ main.cpp: In function 'int main()': main.cpp:2:242: warning: suggest parentheses around comparison in operand of '&' [-Wparentheses] 2 | int x[]={-1,0,1,0},l[1<<15],c[1<<15],a[177][177],b,d,o,q,n,m,k,i,j,v,p,u,*P;main(){std::ifstream f("alee.in");for(f>>n>>m;m--;f>>i>>k,a[i][k]=-1);for(f>>b>>d>>o>>q,i=0;i++<n;*a[i]=a[i][n+1]=a[0][i]=a[n+1][i]=-1);for(a[b][d]=1,l[p]=b,c[p]=d;p<=u&!a[o][q];)for(j=l[p],v=c[p++],k=-1;k++<3;P=&a[j+x[k]][v+x[3-k]],!*P?*P=a[j][v]+1,l[++u]=j+x[k],c[u]=v+x[3-k]:0);std::ofstream("alee.out")<<a[o][q];} | ~^~~