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</style></head><body><div class="sourceCode"><pre class="sourceCode"><code class="sourceCode"><span class="kw" title="KeywordTok">using</span> System.<span class="fu" title="FunctionTok">Collections</span>.<span class="fu" title="FunctionTok">Generic</span>;
<span class="kw" title="KeywordTok">using</span> System.<span class="fu" title="FunctionTok">Linq</span>;
<span class="dt" title="DataTypeTok">void</span> <span class="fu" title="FunctionTok">Main</span>()
{
List<<span class="dt" title="DataTypeTok">string</span>> blocks =
<span class="kw" title="KeywordTok">new</span> List<<span class="dt" title="DataTypeTok">string</span>>() { <span class="st" title="StringTok">"bo"</span>, <span class="st" title="StringTok">"xk"</span>, <span class="st" title="StringTok">"dq"</span>, <span class="st" title="StringTok">"cp"</span>, <span class="st" title="StringTok">"na"</span>, <span class="st" title="StringTok">"gt"</span>, <span class="st" title="StringTok">"re"</span>, <span class="st" title="StringTok">"tg"</span>, <span class="st" title="StringTok">"qd"</span>, <span class="st" title="StringTok">"fs"</span>,
<span class="st" title="StringTok">"jw"</span>, <span class="st" title="StringTok">"hu"</span>, <span class="st" title="StringTok">"vi"</span>, <span class="st" title="StringTok">"an"</span>, <span class="st" title="StringTok">"ob"</span>, <span class="st" title="StringTok">"er"</span>, <span class="st" title="StringTok">"fs"</span>, <span class="st" title="StringTok">"ly"</span>, <span class="st" title="StringTok">"pc"</span>, <span class="st" title="StringTok">"zm"</span> };
List<<span class="dt" title="DataTypeTok">string</span>> words = <span class="kw" title="KeywordTok">new</span> List<<span class="dt" title="DataTypeTok">string</span>>() {
<span class="st" title="StringTok">"A"</span>, <span class="st" title="StringTok">"BARK"</span>, <span class="st" title="StringTok">"BOOK"</span>, <span class="st" title="StringTok">"TREAT"</span>, <span class="st" title="StringTok">"COMMON"</span>, <span class="st" title="StringTok">"SQUAD"</span>, <span class="st" title="StringTok">"CONFUSE"</span>};
<span class="dt" title="DataTypeTok">var</span> solver = <span class="kw" title="KeywordTok">new</span> <span class="fu" title="FunctionTok">ABC</span>(blocks);
<span class="kw" title="KeywordTok">foreach</span>( var word <span class="kw" title="KeywordTok">in</span> words)
{
Console.<span class="fu" title="FunctionTok">WriteLine</span>(<span class="st" title="StringTok">"{0} :{1}"</span>, word, solver.<span class="fu" title="FunctionTok">CanMake</span>(word));
}
}
<span class="kw" title="KeywordTok">class</span> ABC
{
<span class="kw" title="KeywordTok">readonly</span> Dictionary<<span class="dt" title="DataTypeTok">char</span>, List<<span class="dt" title="DataTypeTok">int</span>>> _blockDict = <span class="kw" title="KeywordTok">new</span> Dictionary<<span class="dt" title="DataTypeTok">char</span>, List<<span class="dt" title="DataTypeTok">int</span>>>();
<span class="dt" title="DataTypeTok">bool</span>[] _used;
<span class="dt" title="DataTypeTok">int</span> _nextBlock;
<span class="kw" title="KeywordTok">readonly</span> List<<span class="dt" title="DataTypeTok">string</span>> _blocks;
<span class="kw" title="KeywordTok">private</span> <span class="dt" title="DataTypeTok">void</span> <span class="fu" title="FunctionTok">AddBlockChar</span>(<span class="dt" title="DataTypeTok">char</span> c)
{
<span class="kw" title="KeywordTok">if</span> (!_blockDict.<span class="fu" title="FunctionTok">ContainsKey</span>(c))
{
_blockDict[c] = <span class="kw" title="KeywordTok">new</span> List<<span class="dt" title="DataTypeTok">int</span>>();
}
_blockDict[c].<span class="fu" title="FunctionTok">Add</span>(_nextBlock);
}
<span class="kw" title="KeywordTok">private</span> <span class="dt" title="DataTypeTok">void</span> <span class="fu" title="FunctionTok">AddBlock</span>(<span class="dt" title="DataTypeTok">string</span> block)
{
<span class="fu" title="FunctionTok">AddBlockChar</span>(block[<span class="dv" title="DecValTok">0</span>]);
<span class="fu" title="FunctionTok">AddBlockChar</span>(block[<span class="dv" title="DecValTok">1</span>]);
_nextBlock++;
}
<span class="kw" title="KeywordTok">public</span> <span class="fu" title="FunctionTok">ABC</span>(List<<span class="dt" title="DataTypeTok">string</span>> blocks)
{
_blocks = blocks;
<span class="kw" title="KeywordTok">foreach</span> (var block <span class="kw" title="KeywordTok">in</span> blocks)
{
<span class="fu" title="FunctionTok">AddBlock</span>(block);
}
}
<span class="kw" title="KeywordTok">public</span> <span class="dt" title="DataTypeTok">bool</span> <span class="fu" title="FunctionTok">CanMake</span>(<span class="dt" title="DataTypeTok">string</span> word)
{
word = word.<span class="fu" title="FunctionTok">ToLower</span>();
<span class="kw" title="KeywordTok">if</span> (word.<span class="fu" title="FunctionTok">Length</span> > _blockDict.<span class="fu" title="FunctionTok">Count</span>)
{
<span class="kw" title="KeywordTok">return</span> <span class="kw" title="KeywordTok">false</span>;
}
_used = <span class="kw" title="KeywordTok">new</span> <span class="dt" title="DataTypeTok">bool</span>[_blocks.<span class="fu" title="FunctionTok">Count</span>];
<span class="kw" title="KeywordTok">return</span> <span class="fu" title="FunctionTok">TryMake</span>(word);
}
<span class="kw" title="KeywordTok">public</span> <span class="dt" title="DataTypeTok">bool</span> <span class="fu" title="FunctionTok">TryMake</span>(<span class="dt" title="DataTypeTok">string</span> word)
{
<span class="kw" title="KeywordTok">if</span> (word == <span class="dt" title="DataTypeTok">string</span>.<span class="fu" title="FunctionTok">Empty</span>)
{
<span class="kw" title="KeywordTok">return</span> <span class="kw" title="KeywordTok">true</span>;
}
<span class="dt" title="DataTypeTok">var</span> blocks = _blockDict[word[<span class="dv" title="DecValTok">0</span>]].<span class="fu" title="FunctionTok">Where</span>(b => !_used[b]);
<span class="kw" title="KeywordTok">foreach</span> (var block <span class="kw" title="KeywordTok">in</span> blocks)
{
_used[block] = <span class="kw" title="KeywordTok">true</span>;
<span class="kw" title="KeywordTok">if</span> (<span class="fu" title="FunctionTok">TryMake</span>(word.<span class="fu" title="FunctionTok">Substring</span>(<span class="dv" title="DecValTok">1</span>)))
{
<span class="kw" title="KeywordTok">return</span> <span class="kw" title="KeywordTok">true</span>;
}
_used[block] = <span class="kw" title="KeywordTok">false</span>;
}
<span class="kw" title="KeywordTok">return</span> <span class="kw" title="KeywordTok">false</span>;
}
}
</code></pre></div></body>