Merge branch 'paulo-custodio'

2 files changed, 97 insertions, 0 deletions

diff --git a/challenge-119/paulo-custodio/pascal/ch-1.pas b/challenge-119/paulo-custodio/pascal/ch-1.pas
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+++ b/challenge-119/paulo-custodio/pascal/ch-1.pas
@@ -0,0 +1,37 @@
+(*
+Challenge 119
+
+TASK #1 - Swap Nibbles
+Submitted by: Mohammad S Anwar
+You are given a positive integer $N.
+
+Write a script to swap the two nibbles of the binary representation of the
+given number and print the decimal number of the new binary representation.
+
+A nibble is a four-bit aggregation, or half an octet.
+
+To keep the task simple, we only allow integer less than or equal to 255.
+
+Example
+Input: $N = 101
+Output: 86
+
+Binary representation of decimal 101 is 1100101 or as 2 nibbles (0110)(0101).
+The swapped nibbles would be (0101)(0110) same as decimal 86.
+
+Input: $N = 18
+Output: 33
+
+Binary representation of decimal 18 is 10010 or as 2 nibbles (0001)(0010).
+The swapped nibbles would be (0010)(0001) same as decimal 33.
+*)
+
+program ch1(input, output);
+uses sysutils;
+var
+    n: Integer;
+begin
+    n := StrToInt(paramStr(1));
+    n := (((n div 16) mod 16) + ((n mod 16) * 16));
+    WriteLn(n);
+end.
diff --git a/challenge-119/paulo-custodio/pascal/ch-2.pas b/challenge-119/paulo-custodio/pascal/ch-2.pas
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+++ b/challenge-119/paulo-custodio/pascal/ch-2.pas
@@ -0,0 +1,60 @@
+(*
+Challenge 119
+
+TASK #2 - Sequence without 1-on-1
+Submitted by: Cheok-Yin Fung
+Write a script to generate sequence starting at 1. Consider the increasing
+sequence of integers which contain only 1's, 2's and 3's, and do not have any
+doublets of 1's like below. Please accept a positive integer $N and print the
+$Nth term in the generated sequence.
+
+1, 2, 3, 12, 13, 21, 22, 23, 31, 32, 33, 121, 122, 123, 131, ...
+
+Example
+Input: $N = 5
+Output: 13
+
+Input: $N = 10
+Output: 32
+
+Input: $N = 60
+Output: 2223
+*)
+
+program ch2(input, output);
+uses sysutils;
+function nextSeq(n: Integer): Integer;
+    function numOk(n: Integer): Boolean;
+        var
+            lastDigit, digit: Integer;
+        begin
+            if n <= 0 then
+                numOk := False
+            else begin
+                numOk := True;
+                digit := 0;
+                while n > 0 do begin
+                    lastDigit := digit;
+                    digit := n mod 10;
+                    n := n div 10;
+                    if (digit < 1) or (digit > 3)
+                    or ((digit = 1) and (lastDigit = 1)) then
+                        numOk := False;
+                end;
+            end;
+        end;
+    begin
+        repeat
+            n := n + 1;
+        until numOk(n);
+        nextSeq := n;
+    end;
+var
+    num, i, n: Integer;
+begin
+    num := StrToInt(paramStr(1));
+    n := 0;
+    for i := 1 to num do
+        n := nextSeq(n);
+    WriteLn(n);
+end.