#include <stdio.h>
#include <stdint.h>

void print_array(uint8_t arr[], uint8_t size)
{
    for (uint8_t i = 0; i < size; i++)
    {
        printf("Mark %u = %u\n", i, arr[i]);
    }
}

uint8_t average(uint8_t arr[], uint8_t size)
{
    uint16_t sum = 0;

    for (uint8_t i = 0; i < size; i++)
    {
        sum += arr[i];
    }

    return (uint8_t)(sum / size);
}

uint8_t find_max(uint8_t arr[], uint8_t size)
{
    uint8_t max = arr[0];

    for (uint8_t i = 1; i < size; i++)
    {
        if (arr[i] > max)
        {
            max = arr[i];
        }
    }

    return max;
}

uint8_t count_pass(uint8_t arr[], uint8_t size)
{
    uint8_t count = 0;

    for (uint8_t i = 0; i < size; i++)
    {
        if (arr[i] >= 60)
        {
            count++;
        }
    }

    return count;
}

int main(void)
{
    uint8_t marks[5] = {70, 75, 80, 85, 90};

    printf("Student marks:\n");
    print_array(marks, 5);

    printf("\nAverage = %u\n", average(marks, 5));
    printf("Highest mark = %u\n", find_max(marks, 5));
    printf("Passed students = %u\n", count_pass(marks, 5));

    return 0;
}