uses crt;
var a,b,c:array[1..250]of integer; i,n,dem,dem1,sd,vtd,sa,vta,sdcc,sacc,vtd1,vtc1:integer;
begin
clrscr;
write('Nhap n='); readln(n);
for i:=1 to n do
begin
write('A[',i,']='); readln(a[i]);
end;
dem:=0;
dem1:=0;
for i:=1 to n do
begin
if a[i]>0 then
begin
dem:=dem+1;
b[dem]:=a[i];
end;
if a[i]<0 then
begin
inc(dem1);
c[dem1]:=a[i];
end;
end;
writeln('So duong dau tien trong day la: ',b[1]);
sd:=b[1];
vtd:=n;
for i:=n downto 1 do
if sd=a[i] then
begin
if vtd>i then vtd:=i;
end;
writeln('Chi so cua no la: ',vtd);
writeln('So am dau tien trong day la: ',c[1]);
sa:=c[1];
vta:=n;
for i:=n downto 1 do
if sa=a[i] then
begin
if vta>i then vta:=i;
end;
writeln('Chi so cua no la: ',vta);
writeln('So duong cuoi cung trong day la: ',b[dem]); sdcc:=b[dem];
vtd1:=1;
for i:=1 to n do
if sdcc=a[i] then
begin
if vtd1<i then vtd1:=i;
end;
writeln('Chi so cua no la: ',vtd1);
writeln('So am cuoi cung trong day la: ',c[dem]); sacc:=c[dem];
vtc1:=1;
for i:=1 to n do
if sacc=a[i] then
begin
if vtc1<i then vtc1:=i;
end;
writeln('Chi so cua no la: ',vtc1);
readln;
end.