Add Margo's fibs

2 files changed, 26 insertions, 0 deletions

diff --git a/README.md b/README.md
index d126e3b..d43be80 100644
--- a/README.md
+++ b/README.md
@@ -25,6 +25,9 @@ For a submission to the upcoming "Reclaim your space" exhibition at [Hatch Art G
 ### [`jyoo980`](https://github.com/jyoo980)
 - [`scala`](./entries/jyoo980/scala/Fib.scala)
 
+## [`margoseltzer`](https://github.com/margoseltzer)
+- [`efficiency`](./entries/margoseltzer/efficiency.c)
+
 ### [`Metroxe`](https://github.com/Metroxe)
 - [`html`](./entries/Metroxe/index.html)
 
diff --git a/entries/margoseltzer/efficiency.c b/entries/margoseltzer/efficiency.c
new file mode 100644
index 0000000..6e017f3
--- /dev/null
+++ b/entries/margoseltzer/efficiency.c
@@ -0,0 +1,23 @@
+unsigned long foo(unsigned long n) {
+     if (n < 2) return (n);
+     return(foo(n - 1) + foo(n - 2));
+}
+
+// Efficiency of expression
+
+unsigned long bar(unsigned long n) {
+    unsigned long i, last;
+    unsigned long sum, tmp;
+
+    if (n < 2) return (n);
+    last = 0;
+    sum = 1;
+    for (i = 2; i <= n; i++) {
+        tmp = sum;
+        sum += last;
+        last = tmp;
+    }
+    return (sum);
+}
+
+// Efficiency in resource utilization