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1 files changed, 14 insertions, 0 deletions

diff --git a/problem1/problem1.c b/problem1/problem1.c
new file mode 100644
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--- /dev/null
+++ b/problem1/problem1.c
@@ -0,0 +1,14 @@
+/*
+ If we list all the natural numbers below 10 that are multiples of 3 or 5, we get 3, 5, 6 and 9. The sum of these multiples is 23. Find the sum of all the multiples of 3 or 5 below 1000. */
+
+#include <stdio.h>
+
+int main() {
+	unsigned int sum;
+	for (int i = 1; i < 1000; i++) {
+		if (i % 3 == 0 || i % 5 == 0) {
+			sum += i;
+		}
+	}
+	printf("%u\n", sum);
+}