1 files changed, 33 insertions, 0 deletions
diff --git a/2022/03-rucksack-reorganization/first.zig b/2022/03-rucksack-reorganization/first.zig
new file mode 100644
index 0000000..38c6d0e
--- /dev/null
+++ b/2022/03-rucksack-reorganization/first.zig
@@ -0,0 +1,33 @@
+const std = @import("std");
+
+const example = @embedFile("example");
+const input = @embedFile("input");
+
+pub fn main() anyerror!void {
+    try std.testing.expectEqual(solve(example), 157);
+    const result = try solve(input);
+    try std.io.getStdOut().writer().print("{}\n", .{result});
+}
+
+fn solve(puzzle: []const u8) !u64 {
+    var it = std.mem.tokenize(u8, puzzle, "\n");
+    var tot: u64 = 0;
+    while (it.next()) |line| {
+        var i: usize = 0;
+        var middle = line.len / 2;
+        outer: while (i < middle) : (i += 1) {
+            var j = middle;
+            while (j < line.len) : (j += 1) {
+                if (line[i] == line[j]) {
+                    break :outer;
+                }
+            }
+        }
+        if (line[i] <= 'Z') {
+            tot = tot + line[i] - 'A' + 27;
+        } else {
+            tot = tot + line[i] - 'a' + 1;
+        }
+    }
+    return tot;
+}