uses crt;
const n=5;
var m:array[1..n,1..n]of integer;
i,j:integer;
begin
clrscr;
randomize;
writeln('Исходная матрица');
for i:=1 to n do
begin
for j:=1 to n do
begin
m[i,j]:=random(100);
write(m[i,j]:3);
end;
writeln;
end;
for i:=1 to n do
for j:=n-i+1 to n do m[i,j]:=0;
writeln('Преобразованная матрица');
for i:=1 to n do
begin
for j:=1 to n do
write(m[i,j]:3);
writeln;
end;
readln;
end.