#include <stdio.h>
#define for_i(i, range, inner)                                                 \
    {                                                                          \
        int i;                                                                 \
        for (i = 0; i < range; i++)                                            \
            inner;                                                             \
    }

int main() {
    int a[10], height, count = 0;
    for_i(i, 10, scanf("%d", &a[i]));
    scanf("%d", &height);
    for_i(i, 10, if (a[i] <= height + 30) count++);
    printf("%d", count);
    return 0;
}