Merge pull request #6163 from pokgopun/pwc019

Pwc019

3 files changed, 79 insertions, 0 deletions

diff --git a/challenge-019/pokgopun/README b/challenge-019/pokgopun/README
new file mode 100644
index 0000000000..33dfd303a4
--- /dev/null
+++ b/challenge-019/pokgopun/README
@@ -0,0 +1 @@
+Solution by PokGoPun
diff --git a/challenge-019/pokgopun/go/ch-1.go b/challenge-019/pokgopun/go/ch-1.go
new file mode 100644
index 0000000000..60f72d8951
--- /dev/null
+++ b/challenge-019/pokgopun/go/ch-1.go
@@ -0,0 +1,36 @@
+package main
+
+// Write a script to display months from the year 1900 to 2019 where you find 5 weekends i.e. 5 Friday, 5 Saturday and 5 Sunday.
+// From further analysis, this is only the case for a 31-days month which 1st of the month is Friday
+import (
+	"fmt"
+	"time"
+)
+
+func main() {
+	startY := 1900
+	endY := 2019
+	for y := startY; y <= endY; y++ {
+		fmt.Println(y, happyMonths(y))
+	}
+}
+func happyMonths(y int) (hm []time.Month) {
+	for _, m := range monthsWith31Days() {
+		t := time.Date(y, m, 1, 0, 0, 0, 0, time.UTC)
+		if t.Weekday() == time.Friday {
+			hm = append(hm, m)
+		}
+	}
+	return hm
+}
+func monthsWith31Days() [7]time.Month {
+	return [7]time.Month{
+		time.January,
+		time.March,
+		time.May,
+		time.July,
+		time.August,
+		time.October,
+		time.December,
+	}
+}
diff --git a/challenge-019/pokgopun/go/ch-2.go b/challenge-019/pokgopun/go/ch-2.go
new file mode 100644
index 0000000000..8ca53a0018
--- /dev/null
+++ b/challenge-019/pokgopun/go/ch-2.go
@@ -0,0 +1,42 @@
+package main
+
+import (
+	"bufio"
+	"log"
+	"os"
+	"strconv"
+	"strings"
+)
+
+func main() {
+	var width int
+	if len(os.Args) > 1 {
+		n, err := strconv.ParseUint(os.Args[1], 10, 32)
+		if err != nil {
+			log.Fatal(err)
+		}
+		width = int(n)
+	}
+	// An artificial input source.
+	const input = `Write a script that can wrap the given paragraph at a specified column using the greedy algorithm.`
+	scanner := bufio.NewScanner(strings.NewReader(input))
+	scanner.Split(bufio.ScanWords)
+	var (
+		b  []byte
+		lw int
+		ww int
+	)
+	w := bufio.NewWriter(os.Stdout)
+	for scanner.Scan() {
+		b = scanner.Bytes()
+		ww = len(b)
+		if lw+ww > width {
+			w.WriteByte('\n')
+			lw = 0
+		}
+		w.Write(append(b, ' '))
+		lw += ww + 1
+	}
+	w.WriteByte('\n')
+	w.Flush()
+}