Hype for tomorrow

1 files changed, 65 insertions, 0 deletions

diff --git a/2015/02/solve.c b/2015/02/solve.c
new file mode 100644
index 0000000..e1030a8
--- /dev/null
+++ b/2015/02/solve.c
@@ -0,0 +1,65 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <time.h>
+
+static int part_one(FILE *fp)
+{
+	int res = 0;
+
+	char *line = NULL;
+	size_t len = 0;
+	while (getline(&line, &len, fp) != EOF) {
+		int w, l, h;
+		sscanf(line, "%dx%dx%d", &w, &l, &h);
+		res += 2 * l * w + 2 * w * h + 2 * h * l;
+
+		int a = w * l, b = l * h, c = w * h;
+		res += (a <= b && a <= c) ? a : (b <= c && b <= a) ? b : (c <= a && c <= b) ? c : 0;
+	}
+
+	if (line)
+		free(line);
+
+	return res;
+}
+
+static int part_two(FILE *fp)
+{
+	int res = 0;
+
+	char *line = NULL;
+	size_t len = 0;
+	while (getline(&line, &len, fp) != EOF) {
+		int w, l, h;
+		sscanf(line, "%dx%dx%d", &w, &l, &h);
+
+		int a = 2 * w + 2 * l, b = 2 * l + 2 * h, c = 2 * w + 2 * h;
+		res += (a <= b && a <= c) ? a : (b <= c && b <= a) ? b : (c <= a && c <= b) ? c : 0;
+		res += w * h * l;
+	}
+
+	if (line)
+		free(line);
+
+	return res;
+}
+
+int main(int argc, char *argv[])
+{
+	(void)argc;
+	(void)argv;
+
+	FILE *fp = fopen("input", "r");
+	if (!fp)
+		exit(EXIT_FAILURE);
+
+	clock_t tic = clock();
+	printf("%d\n", part_one(fp));
+	rewind(fp);
+	printf("%d\n", part_two(fp));
+	clock_t toc = clock();
+	printf("TIME: %f seconds\n", (double)(toc - tic) / CLOCKS_PER_SEC);
+
+	fclose(fp);
+	return 0;
+}