#include <stdio.h>
int main() {
    int A[] = {1,1,1,1,1,1,1,2,1,1,3,2,2,4,5,2};
    int i,j=0;
    for (i=0;i<sizeof(A)/sizeof(int);i++) {
        if (i == 0 || A[i-1] != A[i]) {
            A[j++] = A[i];
        }
    }
    for (i=0;i<j;i++) {
        printf("%d ", A[i]);
    }
    printf("\n");
    return 0;
}