1 files changed, 15 insertions, 0 deletions
diff --git a/2022/day04/main.c b/2022/day04/main.c
new file mode 100644
index 0000000..8233265
--- /dev/null
+++ b/2022/day04/main.c
@@ -0,0 +1,15 @@
+#include <stdio.h>
+
+int main()
+{
+    int a1,a2,b1,b2;
+    int overlaps = 0;
+    while (scanf("%d-%d,%d-%d", &a1, &a2, &b1, &b2) != EOF)
+    {
+        // printf("%d-%d,%d-%d", a1, a2, b1, b2);
+        if ( ((a1 >= b1) && (a2 <= b2)) || ((b1 >= a1) && (b2 <= a2))) {
+            overlaps++;
+        }
+    }
+    printf("%d\n", overlaps);
+}