2 files changed, 84 insertions, 0 deletions
diff --git a/challenge-130/abigail/bash/ch-1.sh b/challenge-130/abigail/bash/ch-1.sh
new file mode 100644
index 0000000000..64be01526e
--- /dev/null
+++ b/challenge-130/abigail/bash/ch-1.sh
@@ -0,0 +1,25 @@
+#!/bin/sh
+
+#
+# See ../README.md
+#
+
+#
+# Run as: bash ch-1.sh < input-file
+#
+
+set -f
+
+declare -A numbers
+
+while read -a input
+do   numbers=()
+     for i in "${input[@]}"
+     do    ((numbers[$i] ++))
+     done
+     for i in "${!numbers[@]}"
+     do  if   ((numbers[$i] % 2))
+         then echo $i
+         fi
+     done
+done
diff --git a/challenge-130/abigail/c/ch-1.c b/challenge-130/abigail/c/ch-1.c
new file mode 100644
index 0000000000..6d1fcfa038
--- /dev/null
+++ b/challenge-130/abigail/c/ch-1.c
@@ -0,0 +1,59 @@
+# include <stdlib.h>
+# include <stdio.h>
+# include <string.h>
+
+/*
+ * See ../README.md
+ */
+
+/*
+ * Run as: cc -o ch-1.o ch-1.c; ./ch-1.o < input-file
+ */
+
+int cmp (const void * a, const void * b) {
+    return (* (int *) a - * (int *) b);
+}
+
+int main (void) {
+    char *  line    = NULL;
+    size_t  len     = 0;
+    size_t  str_len;
+
+    while ((str_len = getline (&line, &len, stdin)) != -1) {
+        char * line_ptr = line;
+        int offset = 0;
+        int count  = 0;
+        int number;
+        while (sscanf (line_ptr, "%d%n", &number, &offset) == 1) {
+            count ++;
+            line_ptr += offset;
+        }
+        int * numbers;
+        if ((numbers = (int *) malloc (count * sizeof (int))) == NULL) {
+            perror ("Malloc failed");
+            exit (1);
+        }
+        line_ptr = line;
+        count = 0;
+        while (sscanf (line_ptr, "%d%n", &numbers [count], &offset) == 1) {
+            count ++;
+            line_ptr += offset;
+        }
+
+        qsort (numbers, count, sizeof (int), cmp);
+
+        int found = 0;
+        for (int i = 0; i < count - 1; i += 2) {
+            if (numbers [i] != numbers [i + 1]) {
+                printf ("%d\n", numbers [i]);
+                found ++;
+            }
+        }
+        if (!found) { /* Must be last element */
+            printf ("%d\n", numbers [count - 1]);
+        }
+    }
+    free (line);
+
+    return (0);
+}