uses crt;
const nmax=20;
var a:array[1..nmax,1..nmax] of integer;
b:array[1..nmax*nmax] of integer;
n,i,j:byte;
m:integer;
begin
clrscr;
repeat
write('Размер матрицы до ',nmax,' n=');
readln(n);
until n in [1..nmax];
writeln('Исходная матрица:');
for i:=1 to n do
begin
for j:=1 to n do
begin
a[i,j]:=random(50);
write(a[i,j]:4);
end;
writeln;
end;
writeln;
m:=0;
for i:=1 to n do
if odd(i) then
for j:=1 to n do
begin
m:=m+1;
b[m]:=a[i,j]
end
else
for j:=n downto 1 do
begin
m:=m+1;
b[m]:=a[i,j];
end;
writeln('Массив:');
for i:=1 to m do
write(b[i]:4);
readln
end.