#include <stdio.h>

int check(int A, int list[], int list_cnt){
    int i, ret = 0;
    for(i = 0; i < list_cnt; i++){
        if(A == list[i]){
            ret = 1;
            break;
        }
    }
    return ret;
}

int main(){
    int N, i, j, list_cnt = 0, cnt = 0, new_n = 0;
    int A[100000], list[100000];

    scanf("%d\n", &N);
    for(i = 0; i < N; i++){
        scanf("%d", &A[i]);
    }
    for(i = 0; i < N; i++){
        if(check(A[i], list, list_cnt) != 1){
            for(j = 0; j < N; j++){
                if(A[i] != A[j]){
                    cnt++;
                    //printf("i %d j %d cnt %d\n", i, j, cnt);
                }else if(i != j){
                    break;
                }
                if(cnt == N - 1){
                    new_n++;
                    list[list_cnt++] = A[i];
                    //printf("new i %d j %d\n", i, j);
                    break;
                }
            }
        }
        cnt = 0;
    }


    printf("%d\n", new_n);

    return 0;
}