#include <stdio.h>
#include <stdlib.h>

int sum(int *array, int len)
{
    int i = 0;
    int *p = array;
    int sum = 0;
    for (i = 0; i < len; i++)
    {
        sum += *p;
        p = p + 1;
    }
    return sum;
}

#define ALPHA_SIZE 10
char alpha[] = {'A','B','H','C','E','F','0','1','5','6'};

int main(int argc, char** argv)
{
    int array[] = {1, 2, 3, 4, 5};
    int s = sum(array, 5);
    int mul = atoi(argv[1]);
    int ch_p = (s*mul) % ALPHA_SIZE;

    printf("Sum: %d %c\n", s, (int)alpha[ch_p]);
}