uses crt;
const max=20;
var x:array[1..max,1..max]of integer;
m,n,i,j,k,t:integer;
begin
clrscr;
randomize;
repeat
write('Количество строк от 1 до ',max,' m=');
readln(m);
until m in [1..max];
repeat
write('Количество столбцов от 1 до ',max,' n=');
readln(n);
until n in [1..max];
Writeln('Исходная матрица:');
for i:=1 to m do
begin
for j:=1 to n do
begin
x[i,j]:=random(50)+10;
write(x[i,j]:4);
end;
writeln;
end;
writeln;
writeln('Вставка единиц:');
repeat
write('Введите число от 1 до ',n,' k=');
readln(k);
until k in [1..n];
for i:=1 to m do
begin
for j:=n+1 downto k+2 do
x[i,j]:=x[i,j-1];
x[i,k+1]:=1;
end;
for i:=1 to m do
begin
for j:=1 to n+1 do
write(x[i,j]:4);
writeln;
end;
readln
end.