uses crt;
const n=4; m=4;
var a:array[1..n,1..m+1]of integer;
i,j:integer;
begin
clrscr;
randomize;
writeln('Исходная матрица');
for i:=1 to n do
begin
for j:=1 to m do
begin
a[i,j]:=random(100);
write(a[i,j]:3);
end;
writeln;
end;
for i:=1 to N do a[i,N+1]:=a[i,i] - a[i,N-i+1];
writeln('Преобразованная матрица');
for i:=1 to N do
begin
for j:=1 to M+1 do write(a[i,j]:3);
writeln;
end;
readln;
end.