if panduan(x2)
b=x2;
z=y2;
end
end
[x3,y3]=you(a);
if y3<z
if panduan(x3)
b=x3;
z=y3;
end
end
a1=b;
end
if y==3
[x1,y1]=xia(a);
if y1<z
if panduan(x1)
b=x1;
z=y1;
end
end
[x2,y2]=zuo(a);
if y2<z
if panduan(x2)
b=x2;
z=y2;
end
end
a1=b;
end
end
if x==2
if y==1
[x1,y1]=shang(a);
if y1<z
if panduan(x1)
b=x1;
z=y1;
end
end
[x2,y2]=xia(a);
if y2<z
if panduan(x2)