// 変な方法
#include <time.h>
#include <stdlib.h>
#include <stdio.h>

int shuffle_cmp(const void *x, const void *y){return 2*(random()%2)-1;}
void shuffle(void *b, size_t n, size_t s){return qsort(b,n,s,shuffle_cmp);}

int main(int argc, char **argv)
{
int n, i, *a;
long s;
n = argc>1 ? atoi(argv[1]) : 10;
s = argc>2 ? atoi(argv[2]) : time(NULL);
if (NULL == (a = (int*)malloc(n*sizeof(int)))) return 1;
for(i=0; i<n; i++) a[i] = i;
srandom(s);
shuffle(a,n,sizeof(int));
for(i=0; i<n; i++) printf("%d ", a[i]); puts("");
return 0;
}