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i :=i + 1</font></span></p>
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END</font></span></p>
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END;</font></span></p>
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PROCEDURE
writearray(a : atype);</font></span></p>
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VAR k :
integer;</font></span></p>
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BEGIN</font></span></p>
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k :=1;</font></span></p>
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WHILE k<=max DO</font></span></p>
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BEGIN</font></span></p>
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write(a[k]) ; k :=k+1</font></span></p>
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END</font></span></p>
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END;</font></span></p>
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PROCEDURE quicksort( m , n :
integer);</font></span></p>
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VAR i , j :
integer;</font></span></p>
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PROCEDURE
partition;</font></span></p>
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VAR r :
integer;</font></span></p>
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PROCEDURE
exchange(i , j : integer);</font></span></p>
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VAR</font></span></p>
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temp : integer;</font></span></p>
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BEGIN</font></span></p>
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temp :=a[i]; a[i] :=a[j]; a[j] :=temp</font></span></p>
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END;</font></span></p>
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BEGIN</font></span></p>
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r
:=a[(m+n) DIV 2];</font></span></p>
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i
:=m; j :=n;</font></span></p>
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WHILE i<=j DO</font></span></p>
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BEGIN</font></span></p>
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WHILE a[i]<r DO</font></span></p>
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i :=i+1;</font></span></p>
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WHILE r<a[j] DO</font></span></p>
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j :=j-1;</font></span></p>
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IF i<=j THEN BEGIN</font></span></p>
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exchange(i,j);</font></span></p>
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i :=i+1;</font></span></p>
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j :=j-1</font></span></p>
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END</font></span></p>
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END</font></span></p>
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END;</font></span></p>
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BEGIN</font></span></p>
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IF m<n</font></span></p>
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