52 lines
1.2 KiB
Plaintext
52 lines
1.2 KiB
Plaintext
Program RunLengthEncoding(output);
|
|
|
|
procedure encode(s: string; var counts: array of integer; var letters: string);
|
|
var
|
|
i, j: integer;
|
|
begin
|
|
j := 0;
|
|
letters := '';
|
|
if length(s) > 0 then
|
|
begin
|
|
j := 1;
|
|
letters := letters + s[1];
|
|
counts[1] := 1;
|
|
for i := 2 to length(s) do
|
|
if s[i] = letters[j] then
|
|
inc(counts[j])
|
|
else
|
|
begin
|
|
inc(j);
|
|
letters := letters + s[i];
|
|
counts[j] := 1;
|
|
end;
|
|
end;
|
|
end;
|
|
|
|
procedure decode(var s: string; counts: array of integer; letters: string);
|
|
var
|
|
i, j: integer;
|
|
begin
|
|
s := '';
|
|
for i := 1 to length(letters) do
|
|
for j := 1 to counts[i] do
|
|
s := s + letters[i];
|
|
end;
|
|
|
|
var
|
|
s: string;
|
|
counts: array of integer;
|
|
letters: string;
|
|
i: integer;
|
|
begin
|
|
s := 'WWWWWWWWWWWWBWWWWWWWWWWWWBBBWWWWWWWWWWWWWWWWWWWWWWWWBWWWWWWWWWWWWW';
|
|
writeln(s);
|
|
setlength(counts, length(s));
|
|
encode(s, counts, letters);
|
|
for i := 1 to length(letters) - 1 do
|
|
write(counts[i], ' * ', letters[i], ', ');
|
|
writeln(counts[length(letters)], ' * ', letters[length(letters)]);
|
|
decode(s, counts, letters);
|
|
writeln(s);
|
|
end.
|