uses crt;
const n=4;
m=3;
var a:array[1..n,1..m] of real;
i,j:integer;
sr,s:real;
procedure Srz;
begin
s:=0;
sr:=0;
for i:=1 to n do
for j:=1 to m do
s:=s+a[i,j];
sr:=s/n*m;
for i:=1 to n do
a[1,i]:=sr;
end;
begin
ClrScr;
Randomize;
for i:=1 to n do
begin
for j:=1 to m do
begin
a[i,j]:=-10+random(20);
Write(a[i,j]:6:1);
end;
Writeln;
end;
Writeln;
Srz;
Writeln;
for i:=1 to n do
begin
for j:=1 to m do
Write(a[i,j]:6:1);
Writeln;
end;
Readln;
end.