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Ingy döt Net 2023-07-01 11:58:00 -04:00
parent 7387c8f97b
commit cb5bb5e222
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34
Task/Longest-common-subsequence/Pascal/longest-common-subsequence.pas Normal file
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Program LongestCommonSubsequence(output);
function lcs(a, b: string): string;
var
x, y: string;
lenga, lengb: integer;
begin
lenga := length(a);
lengb := length(b);
lcs := '';
if (lenga > 0) and (lengb > 0) then
if a[lenga] = b[lengb] then
lcs := lcs(copy(a, 1, lenga-1), copy(b, 1, lengb-1)) + a[lenga]
else
begin
x := lcs(a, copy(b, 1, lengb-1));
y := lcs(copy(a, 1, lenga-1), b);
if length(x) > length(y) then
lcs := x
else
lcs := y;
end;
end;
var
s1, s2: string;
begin
s1 := 'thisisatest';
s2 := 'testing123testing';
writeln (lcs(s1, s2));
s1 := '1234';
s2 := '1224533324';
writeln (lcs(s1, s2));
end.