From f8f4649263ffacaf05f227eefea32df652863214 Mon Sep 17 00:00:00 2001
From: Reiner Herrmann <reiner@reiner-h.de>
Date: Wed, 30 Nov 2011 19:57:56 +0100
Subject: added project euler solution 72 in C

---
 src/projecteuler/072.c | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)
 create mode 100644 src/projecteuler/072.c

diff --git a/src/projecteuler/072.c b/src/projecteuler/072.c
new file mode 100644
index 0000000..c886291
--- /dev/null
+++ b/src/projecteuler/072.c
@@ -0,0 +1,16 @@
+#include "common.h"
+
+const int limit = 1000000;
+
+int main()
+{
+    unsigned long* prime_list = primes(limit);
+    unsigned long sum = 0;
+    int n;
+
+    for(n=2; n<limit; n++)
+	sum += phi(n, prime_list);
+
+    printf("%ld\n", sum);
+}
+
-- 
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