const std = @import("std");

pub fn main() !void {
    const stdin = std.io.getStdIn();
    var buf_io = std.io.bufferedReader(stdin.reader());
    var reader = buf_io.reader();

    var buf = [_]u8{0} ** 1024;
    var total: usize = 0;
    while (try reader.readUntilDelimiterOrEof(&buf, '\n')) |line| {
        const trimmed = std.mem.trim(u8, line, "\n\r");
        var it = std.mem.splitScalar(u8, trimmed, 'x');
        const l = try std.fmt.parseInt(u32, it.first(), 10);
        const w = try std.fmt.parseInt(u32, it.next().?, 10);
        const h = try std.fmt.parseInt(u32, it.next().?, 10);
        total += calculate_sqft(l, w, h);
    }

    std.debug.print("{}", .{total});
}

fn calculate_sqft(l: u32, w: u32, h: u32) u32 {
    const coverage = 2 * l * w + 2 * w * h + 2 * h * l;
    const paper = @min(l * w, w * h, h * l);

    return coverage + paper;
}

test "day-test" {
    try std.testing.expectEqual(calculate_sqft(2, 3, 4), 58);
    try std.testing.expectEqual(calculate_sqft(1, 1, 10), 43);
}