<ul>
<li>Write <a href="/en/state%20change%20diagram">state change diagram</a> for small constants</li>
<li>Paint squares that can transition to the losing state to the winning state and squares that can only transition to the winning state to the losing state.</li>
<li>Pattern Discovery] from the painted pattern</li>
</ul>
Example <a href="/en/caddi2018_b">caddi2018_b</a>.
<ul>
<li><img src="https://gyazo.com/3389c6ac2c5426f784be4d9dfd140782/thumb/1000" alt="image">
</li>
<li>Maybe we can paint it with <a href="/en/Grundy%20number">Grundy number</a> since it&#39;s not much of a hassle?
<ul>
<li><img src="https://gyazo.com/bf6c35dd587f5fe2b4510163f946e9dd/thumb/1000" alt="image"></li>
<li>Not always a partial problem XOR.</li>
</ul>
</li>
<li><a href="/en/competitive%20problem">competitive problem</a>
</li>
</ul>
<hr>
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Paint state transition diagrams as winners and losers.