Merge pull request #9412 from jeanluc2020/jeanluc-252

Add solution 252.

1 files changed, 65 insertions, 0 deletions

diff --git a/challenge-252/jeanluc2020/python/ch-1.py b/challenge-252/jeanluc2020/python/ch-1.py
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+#!/usr/bin/python3
+# https://theweeklychallenge.org/blog/perl-weekly-challenge-252/#TASK1
+#
+# Task 1: Special Numbers
+# =======================
+#
+# You are given an array of integers, @ints.
+#
+# Write a script to find the sum of the squares of all special elements of the
+# given array.
+#
+## An element $int[i] of @ints is called special if i divides n, i.e. n % i == 0.
+## Where n is the length of the given array. Also the array is 1-indexed for the task.
+#
+## Example 1
+##
+## Input: @ints = (1, 2, 3, 4)
+## Output: 21
+##
+## There are exactly 3 special elements in the given array:
+## $ints[1] since 1 divides 4,
+## $ints[2] since 2 divides 4, and
+## $ints[4] since 4 divides 4.
+##
+## Hence, the sum of the squares of all special elements of given array:
+## 1 * 1 + 2 * 2 + 4 * 4 = 21.
+#
+## Example 2
+##
+## Input: @ints = (2, 7, 1, 19, 18, 3)
+## Output: 63
+##
+## There are exactly 4 special elements in the given array:
+## $ints[1] since 1 divides 6,
+## $ints[2] since 2 divides 6,
+## $ints[3] since 3 divides 6, and
+## $ints[6] since 6 divides 6.
+##
+## Hence, the sum of the squares of all special elements of given array:
+## 2 * 2 + 7 * 7 + 1 * 1 + 3 * 3 = 63
+#
+############################################################
+##
+## discussion
+##
+############################################################
+#
+# We initialize a variable $result = 0, then we look at each
+# element in the list and add its square to $result if $i divides n.
+
+
+def special_numbers(ints: list) -> int:
+    print("Input: (", ", ".join([str(x) for x in ints]), ")")
+    n = len(ints)
+    result = 0
+    for i in range(n):
+        elem = ints[i]
+        if n % (i+1) == 0:
+            result += elem*elem
+    print(f"Output: {result}")
+    return result
+
+special_numbers([1, 2, 3, 4])
+special_numbers([2, 7, 1, 19, 18, 3])
+