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公共类P49 {




公共静态void main(String[] args) {

int[] arr={10,3,15,7,20 };




静态void countSort(int[] arr) {

int max value=arr[0];

for(int I=1;iarr。长度;i ) {

if(arrmaxValue) {




int[]help=new int[最大值1];

for(int I=0;iarr。长度;i ) {//对出现次数进行计数



int arrIndex=0;

for(int I=0;ihelp.lengthi ) {

while(help0) {







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