1 files changed, 14 insertions, 0 deletions
diff --git a/advent-of-code/2022/04/1.c b/advent-of-code/2022/04/1.c
new file mode 100644
index 0000000..3999003
--- /dev/null
+++ b/advent-of-code/2022/04/1.c
@@ -0,0 +1,14 @@
+#include <stdio.h>
+
+int main() {
+    FILE *fp = fopen("input", "r");
+    int x1, x2, y1, y2;
+    int count = 0;
+    while (fscanf(fp, "%d-%d,%d-%d", &x1, &x2, &y1, &y2) != EOF) {
+        if (x1 <= y1 && x2 >= y2 || x1 >= y1 && x2 <= y2) {
+            count++;
+        }
+    }
+    printf("%d\n", count);
+    return 0;
+}