program dvmas;
var
a: array [1..10,1..10] of integer;
k,i,j,m,n,s,s2: integer;
begin
writeln;
write('n=');
read(n);
write('m=');
read(m);
write('k=');
read(k);
s:=0;
s2:=0;
writeln('dvumernii massiv:');
for i:=1 to n do
begin
writeln;
for j:=1 to m do
begin
a[i,j]:=random(9);
write(a[i][j]);
if(j = 2) then
begin
s:=s+a[i,j];
end;
if(i = k) then
begin
s2:=s2+a[i,j];
end;
end;
end;
writeln;
writeln('srednee ariphm elementov 2 stolbza= ');
write(s/n);
writeln;
writeln('srednee ariphm elementov ',k,' stroki =');
write(s2/m);
readln;
end.