Hafthor

static long gcf(long m, long n)
{
    if (m < n) goto l2;
l1: if ((m %= n) == 0) return n;
l2: if ((n %= m) == 0) return m;
    goto l1;
}

Hafthor

public static void ForwardCopy(byte[] s, uint si, byte[] d, uint di, uint cx) {
    unchecked {
        // pre copy to qword align to destination
        uint cxpre = (8 - (di & 7)) & 7;
        if (cx < cxpre) {
            // early out if we cannot even align to the first qword
            for (int i = 0; i < cx; i++)
                d[di++] = s[si++];
            return;
        }

Hafthor

public class DisposableList<T> : List<T>, IDisposable where T : IDisposable {
    public void Dispose() {
        foreach (var i in this) i.Dispose();
    }
}

Hafthor

// Copyright (c) 2022 Hafthor Stefansson
// Distributed under the MIT/X11 software license
// Ref: http://www.opensource.org/licenses/mit-license.php.
static unsafe void UnsafeSet(byte[] a, uint d, uint c, byte v) {
    unchecked {
        ushort v2 = (ushort)(v << 8 | v);
        uint v4 = (uint)v2 << 16 | v2;
        ulong v8 = (ulong)v4 << 32 | v4;
        fixed (byte* p = a) {
            byte* di = p + d;

Hafthor

// Copyright (c) 2022 Hafthor Stefansson
// Distributed under the MIT/X11 software license
// Ref: http://www.opensource.org/licenses/mit-license.php.
static unsafe void UnsafeCopy(byte[] sa, uint s, byte[] da, uint d, uint c) {
    unchecked {
        fixed (byte* sp = sa, dp = da) {
            byte* si = sp + s, di = dp + d;
            if (c >= 1 && (d & 1) != 0) { // word align
                *((byte*)di) = *((byte*)si);
                si++; di++; c--; d++;

Hafthor

public class Jab : Attribute {
    public T Resolve<T>() where T : class {
        return (T)Resolve(typeof(T));
    }

    public object Resolve(Type typ) {
        var typeToInstantiate = (from t in Assembly.GetExecutingAssembly().GetTypes()
                                 where t.IsDefined(typeof(Jab), false) && t.IsClass && t.IsPublic && t.GetInterfaces().Contains(typ)
                                 select t).Single();
        var defaultConstructor = (from c in typeToInstantiate.GetConstructors().ToList()

Hafthor

package com.hafthor;

import java.util.Scanner;

public class Main {
    public static void main(final String[] args) {
        final RubiksCube rc = new RubiksCube();
        rc.print();
        Scanner scanner = new Scanner(System.in);
        for (; ; ) {

Hafthor

package com.hafthor;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.LinkedList;
import java.util.List;

public class Main {

    public static void main(final String[] args) {

Hafthor

package com.hafthor;

public class Main {
    public static void main(final String[] args) {
        Nonogram n = new Nonogram("1 3 9 122 42 42 122 9 3 1", "33 22 8 121 121 6 22 11 6 4"); // 9
        while(n.solve()) n.print();
        n.print();
    }

    public static class Nonogram {

Hafthor

package com.hafthor;

public class Main {
    public static void main(final String[] args) {
        final String input = "" +
                "89. .5. ..." +
                "2.. 7.9 ..." +
                "..4 ..3 ..." +
                "..9 6.2 ..3" +
                "... ..1 897" +