33 lines
1 KiB
Zig
33 lines
1 KiB
Zig
const std = @import("std");
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pub fn main() !void {
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const stdin = std.io.getStdIn();
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var buf_io = std.io.bufferedReader(stdin.reader());
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var reader = buf_io.reader();
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var buf = [_]u8{0} ** 1024;
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var total: usize = 0;
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while (try reader.readUntilDelimiterOrEof(&buf, '\n')) |line| {
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const trimmed = std.mem.trim(u8, line, "\n\r");
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var it = std.mem.splitScalar(u8, trimmed, 'x');
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const l = try std.fmt.parseInt(u32, it.first(), 10);
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const w = try std.fmt.parseInt(u32, it.next().?, 10);
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const h = try std.fmt.parseInt(u32, it.next().?, 10);
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total += calculate_ribbon(l, w, h);
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}
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std.debug.print("{}", .{total});
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}
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fn calculate_ribbon(l: u32, w: u32, h: u32) u32 {
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const wrapL = l + l + w + w;
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const wrapW = w + w + h + h;
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const wrapH = l + l + h + h;
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return @min(wrapL, wrapW, wrapH) + l * w * h;
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}
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test "day-test" {
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try std.testing.expectEqual(calculate_ribbon(2, 3, 4), 34);
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try std.testing.expectEqual(calculate_ribbon(1, 1, 10), 14);
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}
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