diff --git a/c/2022/4/camp_cleanup.c b/c/2022/4/camp_cleanup.c
new file mode 100644
index 0000000..ebc35bb
--- /dev/null
+++ b/c/2022/4/camp_cleanup.c
@@ -0,0 +1,39 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stdbool.h>
+
+#include "../../lib/aoc.h"
+
+bool fully_contain(char *line) {
+  int a, b, c, d;
+  int y = sscanf(line, "%d-%d,%d-%d", &a, &b, &c, &d);
+  return ((a <= c && b >= d) ||
+	  (c <= a && d >= b));
+}
+
+bool overlap(char *line) {
+  int a, b, c, d;
+  int y = sscanf(line, "%d-%d,%d-%d", &a, &b, &c, &d);
+  return ((a <= c && b >= c) ||
+	  (a <= d && b >= d) ||
+	  (c <= a && d >= a) ||
+	  (c <= b && d >= b));
+}
+
+int main() {
+  char *line;
+
+  int contain_sum = 0;
+  int overlap_sum = 0;
+  while ((line = aoc_read_line()) != NULL) {
+    if (fully_contain(line)) contain_sum++;
+    if (overlap(line)) overlap_sum++;
+  }
+
+  printf("Part 1: %d\n", contain_sum);
+  printf("Part 2: %d\n", overlap_sum);
+
+  aoc_free();
+  return 0;
+}