#include <stdio.h>
#define SIZE 20
int main (void) {
	int set [SIZE] = {0};
	int i, j, test = 0;
	printf("You are about to enter 20 integers ranging from 10 to 100\n");
	for (i = 0; i<SIZE; i++) scanf("%d", &set[i]);
	for (i = 0; i<SIZE; i++) {
		test = 0;
		for (j = 0; j<i; j++){
			if (set[j] == set[i]) test = 1;
		}
		if (!test) printf("%d, ", set[i]);
	}
return 0;
}