2022-04 in zig

1 files changed, 26 insertions, 0 deletions

diff --git a/2022/04-camp-cleanup/second.zig b/2022/04-camp-cleanup/second.zig
new file mode 100644
index 0000000..283169e
--- /dev/null
+++ b/2022/04-camp-cleanup/second.zig
@@ -0,0 +1,26 @@
+const std = @import("std");
+
+const example = @embedFile("example");
+const input = @embedFile("input");
+
+pub fn main() anyerror!void {
+    try std.testing.expectEqual(solve(example), 4);
+    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 it2 = std.mem.tokenize(u8, line, "-,");
+        const a = try std.fmt.parseInt(u64, it2.next() orelse unreachable, 10);
+        const b = try std.fmt.parseInt(u64, it2.next() orelse unreachable, 10);
+        const c = try std.fmt.parseInt(u64, it2.next() orelse unreachable, 10);
+        const d = try std.fmt.parseInt(u64, it2.next() orelse unreachable, 10);
+        if (a <= c and b >= d or a >= c and b <= d or a <= c and b >= c or a <= d and b >= d) {
+            tot += 1;
+        }
+    }
+    return tot;
+}