#include <stdio.h>
#include <time.h>

int main(void)
{
int ar[]={11,12,13,14,15,16,17,18,19,20};
int size=sizeof(ar)/sizeof(ar[0]);
int i, num, temp;

srand( (unsigned)time( NULL ) );
for(i=size-1; i>=0; i--){
num = rand() % (i + 1);
temp = ar[i];
ar[i] = ar[num];
ar[num] = temp;
printf("%d ", ar[i]);
}
return 0;
}