Advent of code day 1

day1_1.c3

@@ -0,0 +1,33 @@
+import std::io;
+import libc;
+
+fn void main()
+{
+	File f;
+	f.open("calories.txt", "rb")!!;
+	defer catch(f.close());
+	usz current_entry = 0;
+	usz max_entry = 0;
+	usz max_elf = 1;
+	usz index_elf = 1;
+	while (!f.eof())
+	{
+		@pool()
+		{
+			char[] line = f.tgetline();
+			if (!line.len)
+			{
+				current_entry = 0;
+				index_elf++;
+				continue;
+			}
+			current_entry += str::to_int(line)!!;
+			if (current_entry > max_entry)
+			{
+				max_elf = index_elf;
+				max_entry = current_entry;
+			}
+		};
+	}
+	io::printfln("Elf #%d carries the most calories (%d)", max_elf, max_entry);
+}

day1_2.c3

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+import std::io;
+
+int[3] entry_max;
+
+fn void update_max(int entry)
+{
+	for (int i = 0; i < 3; i++)
+	{
+		if (entry > entry_max[i])
+		{
+			for (int j = 2; j > i; j--)
+			{
+				entry_max[j] = entry_max[j - 1];
+			}
+			entry_max[i] = entry;
+			return;
+		}
+	}
+}
+
+fn void main()
+{
+	File f;
+	f.open("calories.txt", "rb")!!;
+	defer catch(f.close());
+	int current_entry = 0;
+	while (!f.eof())
+	{
+		@pool()
+		{
+			char[] line = f.tgetline();
+			if (!line.len)
+			{
+				update_max(current_entry);
+				current_entry = 0;
+				continue;
+			}
+			current_entry += str::to_int(line)!!;
+		};
+	}
+	if (current_entry) update_max(current_entry);
+	int sum = 0;
+	foreach (val : entry_max) sum += val;
+	io::printfln("Top three elves carries: %d", sum);
+}