#include<stdio.h>
#include<stdlib.h>
#include<math.h>
#include<time.h>
int main()
{
int a[] = {1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16};
int n=16;
int i,j,T=1000,tmp;
srand(unsigned(time(NULL)));
while(T--)
{
i=rand()%n;
j=rand()%n;
tmp=a[i];
a[i]=a[j];
a[j]=tmp;
}
for(i=0;i<n;i++)
printf("%d ",a[i]);
puts("");
return 0;
}
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