48 lines
825 B
C
48 lines
825 B
C
#include <stdio.h>
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#include <stdlib.h>
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int cost(int mass) {
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return mass / 3 - 2;
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}
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int costRec(int mass, int acc) {
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int c = cost(mass);
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if (c <= 0) {
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return acc;
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}
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return costRec(c, acc+c);
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}
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int part1() {
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FILE* inputFile = fopen("input", "r");
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char line [10];
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int fuel = 0;
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while (fgets(line, sizeof(line), inputFile)) {
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fuel += cost(atoi(line));
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}
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fclose(inputFile);
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return fuel;
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}
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int part2() {
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FILE* inputFile = fopen("input", "r");
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char line [10];
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int fuel = 0;
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while (fgets(line, sizeof(line), inputFile)) {
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fuel += costRec(atoi(line), 0);
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}
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fclose(inputFile);
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return fuel;
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}
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int main(int argc, char *argv[]) {
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printf("Part 1: %d\n", part1());
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printf("Part 2: %d\n", part2());
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return 0;
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}
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