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+/*
+Challenge 201
+
+Task 2: Penny Piles
+Submitted by: Robbie Hatley
+
+You are given an integer, $n > 0.
+
+Write a script to determine the number of ways of putting $n pennies in a row
+of piles of ascending heights from left to right.
+Example
+
+Input: $n = 5
+Output: 7
+
+Since $n=5, there are 7 ways of stacking 5 pennies in ascending piles:
+
+    1 1 1 1 1
+    1 1 1 2
+    1 2 2
+    1 1 3
+    2 3
+    1 4
+    5
+*/
+
+#include <iostream>
+
+int make_piles1(int prev, int n) {
+    int count = 0;
+    if (n == 0)
+        count++;
+    else if (n > 0) {
+        int max = (prev < 0) ? n : prev;
+        for (int i = 1; i <= max; i++)
+            count += make_piles1(i, n-i);
+    }
+    return count;
+}
+
+int make_piles(int n) {
+    return make_piles1(-1, n);
+}
+
+int main(int argc, char* argv[]) {
+    if (argc != 2) {
+        std::cerr << "usage: ch-2 N" << std::endl;
+        exit(EXIT_FAILURE);
+    }
+
+    std::cout << make_piles(atoi(argv[1])) << std::endl;
+}