pwc268 solution in go

2 files changed, 181 insertions, 0 deletions

diff --git a/challenge-268/pokgopun/go/ch-1.go b/challenge-268/pokgopun/go/ch-1.go
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+//# https://theweeklychallenge.org/blog/perl-weekly-challenge-268/
+/*#
+
+Task 1: Magic Number
+
+Submitted by: [47]Mohammad Sajid Anwar
+     __________________________________________________________________
+
+   You are given two arrays of integers of same size, @x and @y.
+
+   Write a script to find the magic number that when added to each
+   elements of one of the array gives the second array. Elements order is
+   not important.
+
+Example 1
+
+Input: @x = (3, 7, 5)
+       @y = (9, 5, 7)
+Output: 2
+
+The magic number is 2.
+@x = (3, 7, 5)
+   +  2  2  2
+@y = (5, 9, 7)
+
+Example 2
+
+Input: @x = (1, 2, 1)
+       @y = (5, 4, 4)
+Output: 3
+
+The magic number is 3.
+@x = (1, 2, 1)
+   +  3  3  3
+@y = (5, 4, 4)
+
+Example 3
+
+Input: @x = (2)
+       @y = (5)
+Output: 3
+
+Task 2: Number Game
+#*/
+//# solution by pokgopun@gmail.com
+
+package main
+
+import (
+	"io"
+	"os"
+	"slices"
+
+	"github.com/google/go-cmp/cmp"
+)
+
+type ints []int
+
+type Answer struct {
+	Val  int
+	None bool
+}
+
+func magicNumber(x, y ints) Answer {
+	l := len(x)
+	if l == 0 || l != len(y) {
+		return Answer{None: true}
+	}
+	slices.Sort(x)
+	slices.Sort(y)
+	l--
+	d := y[l] - x[l]
+	for i := range l {
+		if d != y[i]-x[i] {
+			return Answer{None: true}
+		}
+	}
+	return Answer{Val: d}
+}
+
+func main() {
+	for _, data := range []struct {
+		x, y ints
+		ans  Answer
+	}{
+		{ints{3, 7, 5}, ints{9, 5, 7}, Answer{Val: 2}},
+		{ints{1, 2, 1}, ints{5, 4, 4}, Answer{Val: 3}},
+		{ints{1, 2, 2}, ints{5, 4, 4}, Answer{None: true}},
+		{ints{2}, ints{5}, Answer{Val: 3}},
+		{ints{2}, ints{5, 4}, Answer{None: true}},
+		{ints{}, ints{}, Answer{None: true}},
+	} {
+		io.WriteString(os.Stdout, cmp.Diff(magicNumber(data.x, data.y), data.ans)) // blank if ok, otherwise show the difference
+	}
+}
diff --git a/challenge-268/pokgopun/go/ch-2.go b/challenge-268/pokgopun/go/ch-2.go
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index 0000000000..9dc4ef0482
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+++ b/challenge-268/pokgopun/go/ch-2.go
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+//# https://theweeklychallenge.org/blog/perl-weekly-challenge-268/
+/*#
+
+Task 2: Number Game
+
+Submitted by: [48]Mohammad Sajid Anwar
+     __________________________________________________________________
+
+   You are given an array of integers, @ints, with even number of
+   elements.
+
+   Write a script to create a new array made up of elements of the given
+   array. Pick the two smallest integers and add it to new array in
+   decreasing order i.e. high to low. Keep doing until the given array is
+   empty.
+
+Example 1
+
+Input: @ints = (2, 5, 3, 4)
+Output: (3, 2, 5, 4)
+
+Round 1: we picked (2, 3) and push it to the new array (3, 2)
+Round 2: we picked the remaining (4, 5) and push it to the new array (5, 4)
+
+Example 2
+
+Input: @ints = (9, 4, 1, 3, 6, 4, 6, 1)
+Output: (1, 1, 4, 3, 6, 4, 9, 6)
+
+Example 3
+
+Input: @ints = (1, 2, 2, 3)
+Output: (2, 1, 3, 2)
+     __________________________________________________________________
+
+   Last date to submit the solution 23:59 (UK Time) Sunday 12th May 2024.
+     __________________________________________________________________
+
+SO WHAT DO YOU THINK ?
+#*/
+//# solution by pokgopun@gmail.com
+
+package main
+
+import (
+	"io"
+	"os"
+	"slices"
+
+	"github.com/google/go-cmp/cmp"
+)
+
+type ints []int
+
+type Answer struct {
+	Arr  ints
+	None bool
+}
+
+func numberGame(is ints) Answer {
+	l := len(is)
+	if l%2 != 0 {
+		return Answer{None: true}
+	}
+	slices.Sort(is)
+	for l > 0 {
+		is[l-1], is[l-2] = is[l-2], is[l-1]
+		l -= 2
+	}
+	return Answer{Arr: is}
+}
+
+func main() {
+	for _, data := range []struct {
+		input  ints
+		output Answer
+	}{
+		{ints{2, 5, 3, 4}, Answer{Arr: ints{3, 2, 5, 4}}},
+		{ints{9, 4, 1, 3, 6, 4, 6, 1}, Answer{Arr: ints{1, 1, 4, 3, 6, 4, 9, 6}}},
+		{ints{1, 2, 2, 3}, Answer{Arr: ints{2, 1, 3, 2}}},
+		{ints{1, 2, 3}, Answer{None: true}},
+		{ints{}, Answer{Arr: ints{}}},
+	} {
+		io.WriteString(os.Stdout, cmp.Diff(numberGame(data.input), data.output)) // blank if ok, otherwise show the difference
+	}
+}