const
n=10;
var
a:array[1..n,1..n] of integer;
i,j,k:integer;
sa:real;
begin
for i:=1 to n do
begin
for j:=1 to n do
begin
a[i,j]:=random(40);
write(' ',a[i,j]:3);
end;
writeln();
end;
writeln('--------') ;
k:=0; sa:=0;
for i:=1 to n do
if a[i,2]<>0 then
begin
inc(k);
sa:=sa+a[i,2];
end;
sa:=sa/k;
writeln(sa:0:2);
writeln('--------') ;
for i:=1 to n do
begin
for j:=1 to n do
begin
write(' ',a[i,j]:3);
end;
writeln();
end;
end.