filter

#include <stdio.h>
#include <stdbool.h>
#define SZ 100

int filter(int*,int,int*);
bool check(int);

int main() {
    int data[SZ] = {0}, n = 0, res[SZ] = {0}, m = 0;
    scanf("%d", &n);
    for (int i = 0; i < n; ++i)
        scanf("%d", &data[i]);
    m = filter(data, n, res);
    printf("%d\n", m);
    for (int i = 0; i < m; ++i)
        printf("%d ", res[i]);
    return 0;
}

int filter(int *data, int n, int *res) {
    int m = 0;
    for (int i = 0 ; i < n; ++i)
        if (check(data[i]))
            res[m++] = data[i];
    return m;
}

bool check(int a) {
    return (a % 2 == 0);
}