Family Day update

Task/Maximum-triangle-path-sum/AWK/maximum-triangle-path-sum.awk

@@ -0,0 +1,21 @@
+# syntax: GAWK -f MAXIMUM_TRIANGLE_PATH_SUM.AWK filename(s)
+{   printf("%s\n",$0)
+    cols[FNR] = NF
+    for (i=1; i<=NF; i++) {
+      arr[FNR][i] = $i
+    }
+}
+ENDFILE {
+    for (row=FNR-1; row>0; row--) {
+      for (col=1; col<=cols[row]; col++) {
+        arr[row][col] += max(arr[row+1][col],arr[row+1][col+1])
+      }
+    }
+    printf("%d using %s\n\n",arr[1][1],FILENAME)
+    delete arr
+    delete cols
+}
+END {
+    exit(0)
+}
+function max(x,y) { return((x > y) ? x : y) }

Task/Maximum-triangle-path-sum/Elena/maximum-triangle-path-sum.elena

@@ -44,7 +44,7 @@ public program()
     {
         for(int j := 0, j < 18, j += 1)
         {
-            list[i][j] := mathControl.max(list[i][j] + list[i+1][j], list[i][j] + list[i+1][j+1])
+            list[i][j] := max(list[i][j] + list[i+1][j], list[i][j] + list[i+1][j+1])
         }
     };
 

Task/Maximum-triangle-path-sum/Python/maximum-triangle-path-sum-3.py

@@ -1,14 +1,17 @@
+'''Maximum triangle path sum'''
+
 from functools import (reduce)
-from itertools import (starmap)
 
 
 # maxPathSum :: [[Int]] -> Int
 def maxPathSum(rows):
+    '''The maximum total among all possible
+       paths from the top to the bottom row.
+    '''
     return reduce(
-        lambda xs, ys: list(starmap(
-            lambda a, b, c: a + max(b, c),
-            zip(ys, xs, xs[1:])
-        )),
+        lambda xs, ys: [
+            a + max(b, c) for (a, b, c) in zip(ys, xs, xs[1:])
+        ],
         reversed(rows[:-1]), rows[-1]
     )[0]