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。 GpF, =:
插入排序: U^ BB|
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package org.rut.util.algorithm.support; NVFAmX.Z:
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import org.rut.util.algorithm.SortUtil; Hkx FDU-K
/** e,I-u'mLQs
* @author treeroot R4}G@&Q
* @since 2006-2-2 cZL"e
* @version 1.0 >FHTBh& Y
*/ %{/0K<M
public class InsertSort implements SortUtil.Sort{ oq]KOj[
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/* (non-Javadoc) 0*:]eM};P
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) (m3p28Q?
*/ O\OG~`HBN
public void sort(int[] data) { .(;k]UP
int temp; >~J_9'gX6
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); )'%L#
} x#dJH9NR[
} OY~5o&Oa
} 7"4|`y^#
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} !l6B_[!@
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冒泡排序: ]2zx}D4f
N!RyncJ
package org.rut.util.algorithm.support; %XG X(
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import org.rut.util.algorithm.SortUtil; RWTv,pLK
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/** KU33P>a"[k
* @author treeroot 5bmtUIj
* @since 2006-2-2 Bb:jy!jq_
* @version 1.0 ~n"V0!:'4
*/ h"%6tpV-
public class BubbleSort implements SortUtil.Sort{ mq'q@@:c
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/* (non-Javadoc) :Fj4YP"
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) L ?KEe>;r
*/ 3)0*hq&83
public void sort(int[] data) { ^@X
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int temp; ci3{k"
for(int i=0;i for(int j=data.length-1;j>i;j--){ *+p'CfsSka
if(data[j] SortUtil.swap(data,j,j-1); kV6>O C&^
} 7Oxvq^[
} <\zb*e&vr
} B0Z*YsbXL
} DU1,i&(
5+3Z?|b
} qd{|"(9B
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选择排序: _\o +9X!
sOJ"~p
package org.rut.util.algorithm.support; $ a5K
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import org.rut.util.algorithm.SortUtil; R4V>_\D/
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/** =:a3cr~
* @author treeroot 2?
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* @since 2006-2-2 ?6j@EJ<2q
* @version 1.0 >{GC@Cw
*/ @~gz-l^$
public class SelectionSort implements SortUtil.Sort { u%*;gu"2
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/* ?'_iqg3
* (non-Javadoc) Wdy2;a<\{
* j<L!ONvJ1
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) dd4yS}yBlR
*/ };zF&
public void sort(int[] data) { 5gJQr%pS
int temp; @$(4;ar
for (int i = 0; i < data.length; i++) { U_I'Nz!^t
int lowIndex = i; I|R9@
for (int j = data.length - 1; j > i; j--) { ]i$CE|~
if (data[j] < data[lowIndex]) { i!czI8
lowIndex = j; `C!Pe84(
} ![Jxh,f
} r2&{R!Fj`
SortUtil.swap(data,i,lowIndex); , H[o.r=
} @[JQCQ#r
} }:hdAZ+z
uNx3us-
} c8}1-MKs_R
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Shell排序: _wHqfj)
7CQ48LH]
package org.rut.util.algorithm.support; jliKMd<?
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import org.rut.util.algorithm.SortUtil; 2'@0|k,yC
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/** Y+G4:
* @author treeroot ul% q6=f)
* @since 2006-2-2 TkQ05'Qc
* @version 1.0 3cOXtDV YT
*/ *YDx6\><
public class ShellSort implements SortUtil.Sort{ .+M4Pi
}QC:!e,yG
/* (non-Javadoc) /Hd\VI
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) O~xc>
w
*/ ;CU3CLn
public void sort(int[] data) { ="I]D
I
for(int i=data.length/2;i>2;i/=2){ Pp.X Du
for(int j=0;j insertSort(data,j,i); HWs?,AJNxB
} (,<?Pg7v:f
} %OzxR9
insertSort(data,0,1); 8"S0E(,mu
} +$<m ;@mZ
h"<rW7z
/** Ig9$ PP+3
* @param data `#l_`j=r$
* @param j %F{@DN`
* @param i :z^c<KFX
*/ Zo&U3b{Dy
private void insertSort(int[] data, int start, int inc) { $%!]tNGS
int temp; LL:B
H,[
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); US
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} _/PjeEm
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} rgOB0[
} oFY'Ek;d
Xf Y]qQP
} ^srx/6X
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快速排序: ,{]>U'-
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package org.rut.util.algorithm.support; i #8)ad
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import org.rut.util.algorithm.SortUtil; '5{gWV`
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/** zR]l2zL3
* @author treeroot &:Raf5G-E
* @since 2006-2-2 J/)Q{*`_
* @version 1.0 %"{SGp
*/
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public class QuickSort implements SortUtil.Sort{ ZfIQ Fh>
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/* (non-Javadoc) j1>1vD-`T
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) T}U`?s`)
*/ ?HU(0Vgn'
public void sort(int[] data) { ?n[+0a:8E
quickSort(data,0,data.length-1); UXe @c@3
} %/~Sq?f-9@
private void quickSort(int[] data,int i,int j){ &Tl3\T0D
int pivotIndex=(i+j)/2; ;B!&( 50e
file://swap [{'` |
SortUtil.swap(data,pivotIndex,j);
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%m{h1UQQ+
int k=partition(data,i-1,j,data[j]); WG1x:,-
SortUtil.swap(data,k,j); l? 7D0
if((k-i)>1) quickSort(data,i,k-1); d)9=hp;,V
if((j-k)>1) quickSort(data,k+1,j); o2&mhT
,@(lYeD"
} z!?xz
/** $1/yc#w
u
* @param data |"\A5v|1
* @param i 4fp}`U
* @param j @7.Ews5Mke
* @return y1@{(CDp"
*/ vr2t MD
private int partition(int[] data, int l, int r,int pivot) { W!htCwnkF
do{ .y|*
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); A)'{G
SortUtil.swap(data,l,r); PC=b.H8P+W
} b$%W<D
while(l SortUtil.swap(data,l,r); l2z@t3{
return l; ig jr=e
} Pv/$;R%
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} >'7Icx
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改进后的快速排序: #sN]6
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package org.rut.util.algorithm.support; 4Bs '5@
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import org.rut.util.algorithm.SortUtil; 8)/d8@
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/** o yK'h9Wt1
* @author treeroot <U$x')W
* @since 2006-2-2 <Y9e n!3\
* @version 1.0 GK~uoz:^O
*/ t#=W'HyW8
public class ImprovedQuickSort implements SortUtil.Sort { |+f@w/+
X8"4)IZ3
private static int MAX_STACK_SIZE=4096; <D%.'=%pZ
private static int THRESHOLD=10; 6 -N 442
/* (non-Javadoc) (gQP_Oa(
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Rcc9Tx(zvQ
*/ xo
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public void sort(int[] data) { 3c}@_Yn
int[] stack=new int[MAX_STACK_SIZE]; f;x0Ho5C2
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int top=-1; YZMSiDv[e
int pivot; C[6}
8J|
int pivotIndex,l,r; :Ugf3%sQ
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stack[++top]=0; X @RS
/
stack[++top]=data.length-1; [+
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_ VKBzOH
while(top>0){ C6Lc
int j=stack[top--]; =;ClOy9
int i=stack[top--]; i}[cq_wJ
)[+82~F
pivotIndex=(i+j)/2; ";yey ]
pivot=data[pivotIndex]; u0zF::
qHaH=g%
SortUtil.swap(data,pivotIndex,j); @IhC:Yc
lE'3U qK
file://partition ,)@njC?J
l=i-1; X6*4IE
r=j; <hvs{}TS
do{ Ra)wlIx
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); %<8`(Uu5
SortUtil.swap(data,l,r); SMoJKr(:w#
} '
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while(l SortUtil.swap(data,l,r); >mJH@,F:
SortUtil.swap(data,l,j); q=(%
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& %A&&XT9
if((l-i)>THRESHOLD){ !mHMFwvS
stack[++top]=i; GZH{"_$
stack[++top]=l-1; 4P jC[A*
} Pm&h v*D
if((j-l)>THRESHOLD){ :e1kpQ
stack[++top]=l+1; V^Y'!w\LGI
stack[++top]=j; 2[j(C
} UE8j8U'L
@GUlw[vi
} ZP{<f~;
file://new InsertSort().sort(data); +`,;tz=?
insertSort(data); `>)[UG!:|
} 2Pow-o*r
/** )G#mC0?PV
* @param data /|q.q
*/ ysapvQN_6
private void insertSort(int[] data) { VWq]w5oQO
int temp; '_d4[Olu
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); 5EU~T.4C<
} xt_:R~/[
} aD]!
eP/)
} wg%g(FO
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} &S,_Z/BS;
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归并排序: {ETM >
Z_Wzm!:
package org.rut.util.algorithm.support; `AYq,3V
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import org.rut.util.algorithm.SortUtil; :*f 2Bn
@}=(4%
/** hw$!LTB2
* @author treeroot d~1uK-L]*
* @since 2006-2-2 rk6K0TQ8
* @version 1.0 27k(`{K
*/ _j+!Fd
public class MergeSort implements SortUtil.Sort{ a`L:E'|B9
m9vX8;.
/* (non-Javadoc) eU\xOTl~<{
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) _f'v>"K
*/ 85YUqVi9
public void sort(int[] data) { 84vd~Cf9
int[] temp=new int[data.length]; aaP_^m O
mergeSort(data,temp,0,data.length-1); NV7k@7_{B
} !_vxbfZO
SE'!j]6jI
private void mergeSort(int[] data,int[] temp,int l,int r){ Z\?2"4H
int mid=(l+r)/2; N_IKH)
if(l==r) return ; nl
qn:[BU
mergeSort(data,temp,l,mid); D"J',YN$
mergeSort(data,temp,mid+1,r); g5
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for(int i=l;i<=r;i++){ P #O2MiG
temp=data; f(Y_<%
} /a'1W/^2
int i1=l; N0H=;CIQ
int i2=mid+1; s3HVX'
for(int cur=l;cur<=r;cur++){ #l ZK_N|1x
if(i1==mid+1) N+'j on}U
data[cur]=temp[i2++]; _Ao$)Gu)
else if(i2>r) "$XX4w
M
data[cur]=temp[i1++]; sxsb)a
else if(temp[i1] data[cur]=temp[i1++]; zw['hqW
else f. "\~
data[cur]=temp[i2++]; xNzGp5H
} N ai5!_'
} ?u|@,tQ[
4q E95THB
} <q8@a0e@
=}vT>b
改进后的归并排序: "|h%Uy?XY
-
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package org.rut.util.algorithm.support; <%HRs>4
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import org.rut.util.algorithm.SortUtil;
;%9]G|*{
T1]?E]m{
/** 7Ml4u%?
* @author treeroot h:nybLw?
* @since 2006-2-2 fC[za,PXaE
* @version 1.0 EHk\Q\
*/ Gq^vto
public class ImprovedMergeSort implements SortUtil.Sort { DsejZ&
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private static final int THRESHOLD = 10; Ut;`6t
HwFX,?
/* cg.{oM wa
* (non-Javadoc) `
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* hW~.F
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 8.i4QaU
*/ 83n%pS4x
public void sort(int[] data) { eXW|{asx
int[] temp=new int[data.length]; $@>0;i::
mergeSort(data,temp,0,data.length-1); u.ggN=Z
} BDTL5N
X H-_tvB
private void mergeSort(int[] data, int[] temp, int l, int r) { Qc; kj
int i, j, k; x@t?7 o\&
int mid = (l + r) / 2; z3Q&O$5\
if (l == r) 2yZr!Rb~*
return; "f,{d}u
if ((mid - l) >= THRESHOLD) "2l`XH
mergeSort(data, temp, l, mid); m1l6QcT1
else U[@y8yN6M
insertSort(data, l, mid - l + 1); CIjc5^Y2
if ((r - mid) > THRESHOLD) {~3QBMx6
mergeSort(data, temp, mid + 1, r); `7CK;NeT
else [d: u(
insertSort(data, mid + 1, r - mid); 0B}4$STOo[
H$KO[mW}
for (i = l; i <= mid; i++) { ~SnUnNDm `
temp = data; j*jUcD*
} *.DC(2:o!
for (j = 1; j <= r - mid; j++) { *yu}e)(0
temp[r - j + 1] = data[j + mid]; 4J2^zx,H
} |A%9c.DG.
int a = temp[l];
lN,?N{6s
int b = temp[r]; aQCu3T
for (i = l, j = r, k = l; k <= r; k++) { ieFl4hh[G
if (a < b) { o4);5~1l
data[k] = temp[i++]; 1~5DIU^
a = temp; qN $t_
} else { 0cd_l
2f#g
data[k] = temp[j--]; c$O8Rhx
b = temp[j]; ,o&C"sb
} S#7YJ7
K"N
} MUO<o
} \$ytmtf5
<$A,Ex94
/** Y%pab/Y
* @param data -8Jw_
* @param l CM;b_E)9)f
* @param i =p+y$
*/ !%iHJwS#
private void insertSort(int[] data, int start, int len) { E
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for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); jJy:/!i
} EB~]6.1
} ?sf<cFF
} !@xO]Jwv
}
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堆排序: N3%X>*'
2 !s&|lI
package org.rut.util.algorithm.support; %rzPh<>e
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import org.rut.util.algorithm.SortUtil; W>K^55'
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/** *'%V}R[>
* @author treeroot &Y]':gJ
* @since 2006-2-2 +yGQt3U
* @version 1.0 ,T$ts
*/ . %RM8
public class HeapSort implements SortUtil.Sort{ b)LT[>f
L:z0cvn"
/* (non-Javadoc) ag-A}k>v
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) X8nos
*/ G]^[i6PQs
public void sort(int[] data) { w!.@64-
MaxHeap h=new MaxHeap(); yvAO"43
h.init(data); [q<'ty
for(int i=0;i h.remove(); kv+%
System.arraycopy(h.queue,1,data,0,data.length); 2w 2Bc+#o
} d#k(>+%=Q
2jsbg{QS#_
private static class MaxHeap{ d2rs+-
dbI>\khI
void init(int[] data){ .tngN<f
this.queue=new int[data.length+1]; ,YYEn^:>
for(int i=0;i queue[++size]=data; w5@5"M
fixUp(size); .iXN~*+g
} $l7^-SK`E
} 64s;EC
AK:cDKBO
private int size=0; o[|[xuTm
8bIP"!=*W
private int[] queue; i5,iJe0cA
).T&fa"
public int get() { -%nD'qy,.
return queue[1]; 18X@0e
} Y
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Q;M\fBQO}&
public void remove() { ?,} u6tH
SortUtil.swap(queue,1,size--); $3-vW{<
fixDown(1); ^h(wi`i
} zLI0RI.Pe
file://fixdown }z3j7I
private void fixDown(int k) { $|K
d<wv
int j; )vp0X\3q`
while ((j = k << 1) <= size) { O%bbyR2
if (j < size %26amp;%26amp; queue[j] j++; 9t`;~)o
if (queue[k]>queue[j]) file://不用交换 dG\wW@}J
break; 8{ zX=
SortUtil.swap(queue,j,k); baxZ>KNi
k = j; F:{*4b
} |P|B"I<?
} ?J}Q&p.
private void fixUp(int k) { >lI7]hbIs
while (k > 1) { *Gsj pNr-
int j = k >> 1; Y\|#Lu>B
if (queue[j]>queue[k]) Zk3Pv0c
break; .3!Wr*o
SortUtil.swap(queue,j,k); ]WT@&F
k = j; la!]Y-s)'4
} SZyk G[
} JA^o/%a^
\Mf>X\}
} .@1+}0
c-Lz luWi
} >{#JIG.
;>6< u.N
SortUtil: x4_IUIgh
q"2QNF'
package org.rut.util.algorithm; o)`PSw=
eP{srP3 9
import org.rut.util.algorithm.support.BubbleSort; QX,$JM3
import org.rut.util.algorithm.support.HeapSort; @gUp9ZwtH
import org.rut.util.algorithm.support.ImprovedMergeSort; 'Zx5+rM${}
import org.rut.util.algorithm.support.ImprovedQuickSort; t],a1I.gk
import org.rut.util.algorithm.support.InsertSort; P_bB{~$4
import org.rut.util.algorithm.support.MergeSort; AtT7~cVe
import org.rut.util.algorithm.support.QuickSort; 86&M Zdv6
import org.rut.util.algorithm.support.SelectionSort; ~.a"jYb7A}
import org.rut.util.algorithm.support.ShellSort; Zxk~X}K\P
&@=Jm
/5
/** 0<M-asI?
* @author treeroot qwTz7r
* @since 2006-2-2 cNll??j
* @version 1.0 .i0K-B
*/ '
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public class SortUtil { =SDex.ZK]
public final static int INSERT = 1; #2Rz=QI
public final static int BUBBLE = 2; woI5a ee|
public final static int SELECTION = 3; "N4^ ^~s
public final static int SHELL = 4; P^Hgm
public final static int QUICK = 5; {v={q1
public final static int IMPROVED_QUICK = 6; ,@$5,rNf
public final static int MERGE = 7; `sjY#Ua<
public final static int IMPROVED_MERGE = 8; w,|@e_|J
public final static int HEAP = 9; t}t(fJHY`
"2%z;!U1
public static void sort(int[] data) { ?0qVyK_1
sort(data, IMPROVED_QUICK); s 6Wp"V(
} BR|!ya+_2
private static String[] name={ Bfb~<rs[
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ct+F\:e
}; q~{)
{t;
c
r=Q39{
private static Sort[] impl=new Sort[]{ gC7!cn
new InsertSort(), `Fqth^RK?p
new BubbleSort(), RB>=#03
new SelectionSort(), K)SWM3r
new ShellSort(), #*A'<Zm
new QuickSort(),
3@Ndn
new ImprovedQuickSort(), >t+ ENYb
new MergeSort(), <^S\&v1C_
new ImprovedMergeSort(), Bc>j5^)8w
new HeapSort() m\teE]8x
}; 4[ uqsJB
e=]SIR()`
public static String toString(int algorithm){ |mT%IR
return name[algorithm-1]; =4TQ*;V:
} $v>q'8d
A;cA|`b
public static void sort(int[] data, int algorithm) { _|~Dj)z
impl[algorithm-1].sort(data); =<\22d5L
} R~<N*En~
:>-zT[Lcn
public static interface Sort { XQ1]F{?/H
public void sort(int[] data); 18$d-[hX
} H3wJ5-q(
\p^V~fy7rU
public static void swap(int[] data, int i, int j) { G1|1Z5r
int temp = data; i0M6;W1T
data = data[j]; u%-]-:c
data[j] = temp; pl8b&bLzi
} ~cU1
/CW8
} (Cr