Modified hw3 to newer version

Signed-off-by: jmug <u.g.a.mariano@gmail.com>

hw3/llprograms/c_weighted_sum.c

@@ -0,0 +1,15 @@
+#include <inttypes.h>
+
+int64_t ll_weighted_sum(int64_t a1, int64_t a2, int64_t a3, int64_t a4,
+                        int64_t a5, int64_t a6, int64_t a7, int64_t a8) {
+  int64_t sum = 0;
+  sum += a1 * 1;
+  sum += a2 * 2;
+  sum += a3 * 3;
+  sum += a4 * 4;
+  sum += a5 * 5;
+  sum += a6 * 6;
+  sum += a7 * 7;
+  sum += a8 * 8;
+  return sum;
+}