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

int calculate_fuel1(int mass)
{
    return mass / 3 - 2;
}

int calculate_fuel2(int mass)
{
    int fuel = mass / 3 - 2;
    if (fuel < 0)
        return 0;
    else
        return fuel + calculate_fuel2(fuel);
}

int main(void)
{
    FILE *fp;
    char *line = NULL;
    size_t len = 0;
    ssize_t read;

    fp = fopen("../input", "r");
    if (fp == NULL)
        exit(EXIT_FAILURE);

    int fuel1 = 0;
    int fuel2 = 0;
    int mass;

    while ((read = getline(&line, &len, fp)) != -1) {
        mass = atoi(line);
        fuel1 += calculate_fuel1(mass);
        fuel2 += calculate_fuel2(mass);
    }

    printf("Solution for Part One: %d\n", fuel1);
    printf("Solution for Part Two: %d\n", fuel2);

    fclose(fp);
    free(line);

    return 0;
}