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int y;
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int Search( int left, int right )
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{
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if( left > right )
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return -1;
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else
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{
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int mid = ( left + right ) / 2;
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if( a[ mid ] == y )
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return mid;
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else if( a[ mid ] > y )
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return Search( left, mid - 1 );
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else
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return Search( mid + 1, right );
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}
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}
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