day 4 initial solution

1 files changed, 36 insertions, 0 deletions

diff --git a/22.4/main.cpp b/22.4/main.cpp
new file mode 100644
index 0000000..cf7f9c0
--- /dev/null
+++ b/22.4/main.cpp
@@ -0,0 +1,36 @@
+#include <cstdio>
+using namespace std;
+
+bool
+range_contains(int a1, int a2, int b1, int b2)
+{
+	return a1 <= b1 && b2 <= a2;
+}
+
+bool
+range_in(int a1, int a2, int v)
+{
+	return a1 <= v && v <= a2;
+}
+
+bool
+range_overlap(int a1, int a2, int b1, int b2)
+{
+	return range_in(a1, a2, b1) || range_in(a1, a2, b2) || range_in(b1, b2, a1) || range_in(b1, b2, a2);
+}
+
+int
+main()
+{
+	int a1, a2, b1, b2;
+	int total1 = 0;
+	int total2 = 0;
+	while (scanf("%d-%d,%d-%d ", &a1, &a2, &b1, &b2) == 4) {
+		if (range_contains(a1, a2, b1, b2) || range_contains(b1, b2, a1, a2))
+			total1++;
+		if (range_overlap(a1, a2, b1, b2))
+			total2++;
+	}
+	printf("%d\n", total1);
+	printf("%d\n", total2);
+}