用Java语言实现的各种排序,包括插入排序、冒泡排序、选择排序、Shell排序、快速排序、归并排序、堆排序、SortUtil等。 !1l~UB_
插入排序: v]k-xn|$j
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package org.rut.util.algorithm.support; vhBW1/w&F
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import org.rut.util.algorithm.SortUtil; DhE-g<
/** b1C)@gl !Z
* @author treeroot [lzd'
* @since 2006-2-2 jrp>Y:
* @version 1.0 t]HY@@0g
*/ w9'>&W8T
public class InsertSort implements SortUtil.Sort{ Mq\=pxC@
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/* (non-Javadoc) D7hTn@I
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) syw1Z*WK
*/ b6-N2F1Fs
public void sort(int[] data) { L;3%8F\-.
int temp; n{gEIUo#
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); q%sZV>
} -`faXFW'
} 9L>?N:%5
} COw"6czX/
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} `G$>T#Dq
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冒泡排序: EJn]C=_(
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package org.rut.util.algorithm.support; 6=f)3!=
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import org.rut.util.algorithm.SortUtil; qPPe)IM'Sc
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/** q;68tEupR
* @author treeroot B<d=;V
* @since 2006-2-2 70qEqNoC
* @version 1.0 72, m c
*/ _V"0g=&Hc
public class BubbleSort implements SortUtil.Sort{ 0x<ASfka
JK2{9#*
/* (non-Javadoc) h%EeU
3
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) YdhV
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*/ <@Q27oEuA
public void sort(int[] data) { d]0:r]e
int temp; W]po RTJ:
for(int i=0;i for(int j=data.length-1;j>i;j--){ `0Udg,KOs
if(data[j] SortUtil.swap(data,j,j-1); nI3p`N8j*
} *'?ZG/ (
} Kg6J:HD49
} s, Gl{
} ek&~A0k_o
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} X7$]qE K
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选择排序: PaKa bPY
xUn"XkhP
package org.rut.util.algorithm.support; 9Jwd *gevV
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import org.rut.util.algorithm.SortUtil; &. =8Q?
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/** 7n5gXiI"
* @author treeroot "}3sL#|z
* @since 2006-2-2 PSJj$bt;<+
* @version 1.0 ]he~KO[j<
*/ `Wx|
4
public class SelectionSort implements SortUtil.Sort { $UzSPhv[
EGl<oxL*R2
/* ZS.=GjK
* (non-Javadoc) M@T{uo
* as@8L|i*
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) qxI$F
*/ Ae7FtJO
public void sort(int[] data) { ^Q#_
int temp; %2:UsI
for (int i = 0; i < data.length; i++) { X(tx8~z
int lowIndex = i; e(s0mbJE
for (int j = data.length - 1; j > i; j--) { 6_%Cd`4Z
if (data[j] < data[lowIndex]) { N[cIr{XBGN
lowIndex = j; +mrLMbBiD
} 6) i-S<(
} K9@.l~n
SortUtil.swap(data,i,lowIndex); 0h1u W26^
} Y*BmBRN
} Jh.~]\u
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} J'2 Yrn
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Shell排序: &MH8~LSb
O\Huj=
package org.rut.util.algorithm.support; byI"
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import org.rut.util.algorithm.SortUtil; L!:NL#M
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/** )Ra:s>
* @author treeroot 2{j$1EdI@-
* @since 2006-2-2 L]MWdD
* @version 1.0 K^!#;,0
*/ W/UA%We3+L
public class ShellSort implements SortUtil.Sort{ 0m3hL~0(a
$TK*w8@:
/* (non-Javadoc) z6w'XA1_+t
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) "" UyfC[
*/ !Q"L)%)'A
public void sort(int[] data) { -Y524
for(int i=data.length/2;i>2;i/=2){ 6 ZRc|ZQ
for(int j=0;j insertSort(data,j,i); \~8W0q.4M
} dCo)en
} U nDCC_ud
insertSort(data,0,1); p
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} :WRD<D_4
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/** 1{M?_~g4
* @param data y CHOg
* @param j VKPEoy8H
* @param i i1x4$}
*/ *w;?&)8%
private void insertSort(int[] data, int start, int inc) { [.>=>KJ_
int temp; 79 4UY
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); K1X-<5]{
} Y-})/zFc
} D zD5n
} .iV=ybMT
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} o1#3A
#)}BY"C%
快速排序: |"K%Tvxe
Do(G;D`h+_
package org.rut.util.algorithm.support; ,~cK]!:>s
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import org.rut.util.algorithm.SortUtil; ; s(bd#Q
9gA@D%0
/** V06*qQ[
* @author treeroot mW]dhY 3X
* @since 2006-2-2 9iT9ZfaW
* @version 1.0 6{;6~?U
*/ 2K_ QZ
public class QuickSort implements SortUtil.Sort{ ;#zteqn
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/* (non-Javadoc) c9c]1XJ
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) K^o$uUBe
*/ IwYfs]-
public void sort(int[] data) { zx<t{e7
quickSort(data,0,data.length-1); Z4G%Ve[
} @MibKj>o
private void quickSort(int[] data,int i,int j){ ^; /~$
int pivotIndex=(i+j)/2; {*bx8*y1
file://swap p[&Jl
SortUtil.swap(data,pivotIndex,j); S8qg"YR
}Nn+Ny
int k=partition(data,i-1,j,data[j]); 8/p ]'BLf
SortUtil.swap(data,k,j); ->pU!f)\X
if((k-i)>1) quickSort(data,i,k-1); _f2rz+
if((j-k)>1) quickSort(data,k+1,j); 8L:AmpQdpA
mKtMI!FR
} `<>#;%
/** }o]}R#|
* @param data A)~oD_ooQ
* @param i $`UdG0~
* @param j &L0Ii)Ns
* @return #NyO'
*/ )7Hx<?P
private int partition(int[] data, int l, int r,int pivot) { RNB-W%
do{ gm5%X'XL
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); KRGj6g+
SortUtil.swap(data,l,r); 9.xb-m7
} .feB
VRg
while(l SortUtil.swap(data,l,r); ;m]
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return l; W2h*t"5W
} ,(oolx"Xa
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8\C
} PJ:!O?KVq
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改进后的快速排序: DCa[?|Y
i5(qJ/u
package org.rut.util.algorithm.support; n]vCvmt
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import org.rut.util.algorithm.SortUtil; #:=c)[G8
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/** ;fV"5H)U\
* @author treeroot d. d J^M
* @since 2006-2-2 \<9aS Y'U
* @version 1.0 R-$w*=Y
*/ ]UIN4E
public class ImprovedQuickSort implements SortUtil.Sort { 'O 7:=l
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private static int MAX_STACK_SIZE=4096; 5f_x.~ymA
private static int THRESHOLD=10; c^"4l
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/* (non-Javadoc) nv0D4 t
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 851BOkRal4
*/ 5X3JQ"z
public void sort(int[] data) { tHaHBx1P
int[] stack=new int[MAX_STACK_SIZE]; bkR~>F]FAu
0-OKbw5%=b
int top=-1; QpzdlB44l
int pivot; <gX({FA
int pivotIndex,l,r; <9H3d7%
Q7pCF,;
stack[++top]=0; vD2(M1Q
stack[++top]=data.length-1; :?EZ\WM7
Lm!]m\LRZD
while(top>0){ C!547(l[
int j=stack[top--]; 29 !QE>Q
int i=stack[top--]; &!;o[joG
c{`!$Z'k<
pivotIndex=(i+j)/2; ((AK7hb
pivot=data[pivotIndex]; mGg/F&G9
4D5Wse
SortUtil.swap(data,pivotIndex,j); ~Ih`
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w9u|E46
file://partition )y:M8((%
l=i-1; K_t >T)K
r=j; :xmj42w>^
do{ r]}6iF.
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); <%^WZ:c
SortUtil.swap(data,l,r); <% mD#S
} 6;~V@t
while(l SortUtil.swap(data,l,r); o
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SortUtil.swap(data,l,j); b!MN QGs
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if((l-i)>THRESHOLD){ /xSJljexz
stack[++top]=i; #N`MzmwS
stack[++top]=l-1; zGme}z;1@
} nT4Ryld
if((j-l)>THRESHOLD){ i.K!;E>
stack[++top]=l+1; }X])055S
stack[++top]=j; LIJ#nb
} l'Li!u
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} N? S;v&q+
file://new InsertSort().sort(data); z+M{zr
insertSort(data); l`6.(6
} 5`}za-
/** &RuTq6)r
* @param data $uwz`N:
*/ ,|8aDL?
private void insertSort(int[] data) { F W2x
int temp; ( +S-
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); Qa2p34Z/
} v:!TqfI
} 3GL?&(eU;
} ":sp0(`h
~c+=$SL-=
} 7r3CO<fb
OP= oSfa
归并排序: T6?03cSE
V_^pPBa
package org.rut.util.algorithm.support; [T'[7Z
c#?~1@=
import org.rut.util.algorithm.SortUtil; Bk~lM'
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/** qfAnMBM1@
* @author treeroot vEG7A$Z"
* @since 2006-2-2 c9@3=6S/
* @version 1.0 #u"@q< )
*/ FP y}Wc*UA
public class MergeSort implements SortUtil.Sort{ 6]GHCyo
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/* (non-Javadoc) t0xE
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) W}7Uh
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*/ a_\7Ho$^
public void sort(int[] data) { x~m$(LT
int[] temp=new int[data.length]; ~Sf'bj;(
mergeSort(data,temp,0,data.length-1); 7F2:'3SQ
} 3DCR n :
7Kj7or|
private void mergeSort(int[] data,int[] temp,int l,int r){ 4!3<[J;N;
int mid=(l+r)/2; ~kpa J'm
if(l==r) return ; )_Hv9!U]e
mergeSort(data,temp,l,mid); E@Ewx;P5
mergeSort(data,temp,mid+1,r); Y[VXx8"p
for(int i=l;i<=r;i++){ gs.+|4dv
temp=data; #5^OO ou|
} fQ.S ,lMe
int i1=l; 7N5M=f.DS(
int i2=mid+1; +|<bb8%
for(int cur=l;cur<=r;cur++){ -)&lsFF
if(i1==mid+1) G&Yo2aADR
data[cur]=temp[i2++]; } nIYNeP?D
else if(i2>r) L*p7|rq$"
data[cur]=temp[i1++]; I"8Z'<|/\q
else if(temp[i1] data[cur]=temp[i1++]; ~rq:I<5
else Xmb##:
data[cur]=temp[i2++]; Jp8,s%
} W?N+7_%'
} _TJkYz$
Z,-TMtM7
} VgY6M_V
q)@;8Z=_c
改进后的归并排序: c/F!cW{z^
<Nloh+n=
package org.rut.util.algorithm.support; vy7?]}MvV
wsR\qq
import org.rut.util.algorithm.SortUtil; &liFUP?
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/** vUL@i'0&o
* @author treeroot S@
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* @since 2006-2-2 )Fqtb;W=
* @version 1.0 x a\~(B.
*/ F7=\*U
public class ImprovedMergeSort implements SortUtil.Sort { "*c&[ALw
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private static final int THRESHOLD = 10; z0Y L,
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/* ;_ 1Rk&o!
* (non-Javadoc) R+U*]5~R
* U(~Nmo'
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) *y+K{ fM1
*/ /L]@k`.q@
public void sort(int[] data) { .345%j
int[] temp=new int[data.length]; KAT"!b
mergeSort(data,temp,0,data.length-1); =:TQ_>$Nc2
} <h~uGBS"
U`{ M1@$
private void mergeSort(int[] data, int[] temp, int l, int r) { MP
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int i, j, k; r'|ei ,
int mid = (l + r) / 2; wXYT(R
if (l == r) !WB3%E,I
return; >*|Eyv_
if ((mid - l) >= THRESHOLD) . 7Pp'-hK
mergeSort(data, temp, l, mid); DU5rB\!.~
else ^|!\IzDp
insertSort(data, l, mid - l + 1); e-xT.RnQ
if ((r - mid) > THRESHOLD) AXo)(\
mergeSort(data, temp, mid + 1, r); @P=n{-pIW
else ?H{?jJj$H
insertSort(data, mid + 1, r - mid); ds2xl7jg
:efDPNm5
for (i = l; i <= mid; i++) { Tjj27+y*\
temp = data; nxm*.&#p?
} k<o<!
for (j = 1; j <= r - mid; j++) { >RiU/L
temp[r - j + 1] = data[j + mid]; ~X;sa,)L1+
} -l"8L;`
int a = temp[l]; xi.QHKBZaH
int b = temp[r]; 2@&"*1(Xu
for (i = l, j = r, k = l; k <= r; k++) { 0'zjPE#
if (a < b) { ~PN[ #e]
data[k] = temp[i++]; idS+&:'
a = temp; )Dcee@/7S
} else { 5mZ9rLn
data[k] = temp[j--]; CWD
$\K G
b = temp[j]; sI4
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} )%:
W;H
} kWbY&]ZO
} (5 RZLRn
)R@Y$*fm
/** )1)&fN41i#
* @param data IJ{VCzi
* @param l Z#GR)jb+
* @param i \x_$Pu
*/ {PL,3EBG
private void insertSort(int[] data, int start, int len) {
y}W*P#BDO
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Kc3/*eu;
} ;~}!P7z
} k$,y1hH;f8
} `y1,VY
} @d^MaXp_P
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堆排序: E_xk8X~
5YiBPB")
package org.rut.util.algorithm.support; |A H@W#7j
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import org.rut.util.algorithm.SortUtil; Gl T/JZ9
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/** <1U *{y
* @author treeroot X(>aW*q
* @since 2006-2-2 (g tOYEqx
* @version 1.0 MR* %lZpB
*/ (Q|Y*yI
public class HeapSort implements SortUtil.Sort{ woU3WS0
r6+IJxUd
/* (non-Javadoc) 8PGuZw<
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ;s-fYS6(>{
*/ !Ome;gS)
public void sort(int[] data) { y8|}bd<Sr
MaxHeap h=new MaxHeap(); iz`ys.Fu
h.init(data); Lo9
\[4FP
for(int i=0;i h.remove(); h*mKS -TC
System.arraycopy(h.queue,1,data,0,data.length); z9zo5Xc=
} lF$$~G
p"n3JV.~k+
private static class MaxHeap{ uF T5Z
c+<gc:#jy
void init(int[] data){ _b[Pk;8}j;
this.queue=new int[data.length+1]; \@7 4I7
for(int i=0;i queue[++size]=data; &KeD{M%
fixUp(size); ZD8E+]+
} b$B-LvHd1
} B=i%Z_r]w
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private int size=0; T%2%*oa
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private int[] queue;
&y7~
dQ Ao~]B
public int get() { M[&p[P@
return queue[1]; 2AjP2
} x=44ITe1n[
PE+{<[n
public void remove() { U9//m=_
SortUtil.swap(queue,1,size--); A~wyn5:_
fixDown(1); \H/}|^+@
} ${7s"IX
file://fixdown ">R`S<W
private void fixDown(int k) { ]=%u\~AvL
int j; z`|E0~{-
while ((j = k << 1) <= size) { jx];=IC3tt
if (j < size %26amp;%26amp; queue[j] j++; %U&ztvR0C
if (queue[k]>queue[j]) file://不用交换 StMvz~
break; )B Xl|V,
SortUtil.swap(queue,j,k); 5R#:ALwX:
k = j; Now2ad&
} I]N!cEr;@-
} dcN4N5r
private void fixUp(int k) { Ns[.guWu-
while (k > 1) { %VgK::)r
int j = k >> 1; zm^5WH
if (queue[j]>queue[k]) z%/<|`
7
break;
yc@:*Z
SortUtil.swap(queue,j,k); bKPjxN?!9
k = j; #r80FVwiD
} rj;~SC{
} q%Lw#f
M_F4I$V4
} DOWZhD
:J6FI6
} }+
TA+;
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SortUtil: LQa1p
)0 i$Bo
package org.rut.util.algorithm; S >\\n^SbT
a(+u"Kr
z
import org.rut.util.algorithm.support.BubbleSort; i8(n(
import org.rut.util.algorithm.support.HeapSort; IS }U2d,W
import org.rut.util.algorithm.support.ImprovedMergeSort; O:[@?l
import org.rut.util.algorithm.support.ImprovedQuickSort; VN<baK%]
import org.rut.util.algorithm.support.InsertSort; hKFB=U
import org.rut.util.algorithm.support.MergeSort; m\J"P'=
import org.rut.util.algorithm.support.QuickSort; 7e@Bkq0)
import org.rut.util.algorithm.support.SelectionSort; N+ ei)-
import org.rut.util.algorithm.support.ShellSort; 6)#%36rP
T04&Tl'CT
/** 3-
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* @author treeroot yI*h"?7T
* @since 2006-2-2 (:J
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* @version 1.0 G)y'ex k
*/ 4 !M6RL8{
public class SortUtil { F}_Zh9/$(
public final static int INSERT = 1; 8HH\wu$$e
public final static int BUBBLE = 2; _jrkR
n1 "
public final static int SELECTION = 3; 4fdO Ow
public final static int SHELL = 4; I6F $@
public final static int QUICK = 5; R2nDK7j
public final static int IMPROVED_QUICK = 6; uWerC?da
public final static int MERGE = 7; ,koG*sn
public final static int IMPROVED_MERGE = 8; l`RFi)u~&
public final static int HEAP = 9; :<E\&6# oC
ZUeA&&{
public static void sort(int[] data) { y O?52YO
sort(data, IMPROVED_QUICK); Zq"wq[GCN
} bR|1*<
private static String[] name={ <fcw:Ae
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" xT3l>9i
}; Dlu]4n[LB
/pnQKy.
private static Sort[] impl=new Sort[]{ zH?&FtO
new InsertSort(), ,DWC=:@X
new BubbleSort(), fm^)u"
new SelectionSort(), 38(|a5
new ShellSort(), :vy./83W
new QuickSort(), W|[k]A` 2
new ImprovedQuickSort(), G X>T~i\f8
new MergeSort(), 3`Q>s;DjIU
new ImprovedMergeSort(), ),+u>Os&
new HeapSort() kn7Qvk[+
}; e!*%U=[Q
D
z5(v1I9A
public static String toString(int algorithm){ 3`\)Qm
return name[algorithm-1]; X+k`UM~
} v@E/?\k"
|oJ R+
public static void sort(int[] data, int algorithm) { v_ W03\
impl[algorithm-1].sort(data); Y@M
l}43
} rlVo}kc7:
i"C?6R
public static interface Sort { Ol.
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public void sort(int[] data); G,b1 u"
} e.^Y4(
DM@&=c
public static void swap(int[] data, int i, int j) { $ *^E
int temp = data; 'l3K*lck
data = data[j]; x<e-%HB*-
data[j] = temp; (Qys`D
} Y=N; Bj
} <E&"]