Merge pull request #10125 from pokgopun/pwc270

pwc270 - improvement on ch-2

2 files changed, 18 insertions, 22 deletions

diff --git a/challenge-270/pokgopun/go/ch-2.go b/challenge-270/pokgopun/go/ch-2.go
index fb096121d2..07d27baca7 100644
--- a/challenge-270/pokgopun/go/ch-2.go
+++ b/challenge-270/pokgopun/go/ch-2.go
@@ -88,25 +88,22 @@ func distElem(ints []int, x, y int) int {
 	mx := ints[l-1]
 	c := 0
 	for {
-		ints = ints[:slices.Index(ints, mx)]
-		l = len(ints)
+		l = slices.Index(ints, mx)
 		if l == 0 {
 			break
 		}
+		d := mx - ints[l-1]
 		if l == 1 || 2*x < y {
-			for ints[l-1] < mx {
-				for i := range l {
-					ints[i]++
-					c += x
-				}
+			for i := range l {
+				ints[i] += d
+				c += x * d
 			}
 		} else {
-			for ints[l-1] < mx {
-				for i := range 2 {
-					ints[l-1-i]++
-				}
-				c += y
+			p := l / 2
+			for i := range p * 2 {
+				ints[l-1-i] += d
 			}
+			c += y * p * d
 		}
 	}
 	return c
diff --git a/challenge-270/pokgopun/python/ch-2.py b/challenge-270/pokgopun/python/ch-2.py
index ac6e3bbcb0..ad5035105a 100644
--- a/challenge-270/pokgopun/python/ch-2.py
+++ b/challenge-270/pokgopun/python/ch-2.py
@@ -76,20 +76,19 @@ def distElem(ints: list, x: int, y: int):
     mx = ints[-1]
     c = 0
     while True:
-        ints = ints[:ints.index(mx)]
-        l = len(ints)
+        l = ints.index(mx)
         if l == 0:
             break
+        d = mx - ints[l-1]
         if l == 1 or 2*x < y:
-            while ints[-1] < mx:
-                for i in range(l):
-                    ints[i] += 1
-                    c += x
+            for i in range(l):
+                ints[i] += d
+                c += x * d
         else:
-            while ints[-1] < mx:
-                for i in range(-2,0):
-                    ints[i] += 1
-                c += y
+            p = l // 2
+            for i in range(2*p):
+                ints[l-1-i] += d
+            c += y * p * d
     return c
 
 import unittest