#include <stdlib.h>
#include <stdio.h>
#include <time.h>
 
int main(void)
{
    clock_t start, end;
     start = clock();
    int a[100];
    int i = 0, j = 0, k = 0;
    srand((unsigned)time(NULL));
    for (i = 0; i < 100; i++) {
        for (j = 0; j < 100; j++) {
            a[j] = rand()%100;
            for(k = 0; k < j; k++)
                if (a[j] == a[k]) {
                    j--;
                    break;
            }
        }
 
        /*for(int j = 0; j < 100; j++)
            printf("%d\t",a[j]);
 
        printf("\n\n");	*/	
    }
    end = clock();
    double diff = end - start;
    printf(" %f  sec", diff / CLOCKS_PER_SEC );
    system("PAUSE");
    return 0;
} 

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