80 lines
1.8 KiB
C
80 lines
1.8 KiB
C
#include <stdio.h>
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#include <string.h>
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#include <stdbool.h>
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#include <stdlib.h>
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typedef struct {
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char name;
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bool completed;
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char requirements[50];
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char requirements_count;
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} Step;
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typedef struct {
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Step steps[50];
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int size;
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} StepList;
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Step *step_list_find_step(StepList *list, char key) {
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for (int i = 0; i < list->size; i++) {
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if (list->steps[i].name == key) {
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return &(list->steps[i]);
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}
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}
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return NULL;
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}
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void step_list_add_step(StepList *list, char name) {
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list->steps[list->size++].name = name;
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}
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void step_add_requirement(Step *step, char requirement) {
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step->requirements[step->requirements_count++] = requirement;
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}
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bool read_line(FILE *input, StepList *list) {
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char name;
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char requirement;
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bool success = fscanf(input, "Step %c must be finished before step %c can begin.\n", &name, &requirement) == 2;
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if (!success) return false;
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Step *step = step_list_find_step(list, name);
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if (step == NULL) {
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step_list_add_step(list, name);
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step = step_list_find_step(list, name);
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}
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step_add_requirement(step, requirement);
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return true;
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}
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int part_1(FILE *input) {
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rewind(input);
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StepList step_list = {0};
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while (read_line(input, &step_list)) {}
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for (int i = 0; i < step_list.size; i++) {
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Step step = step_list.steps[i];
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for (int j = 0; j < step.requirements_count; j++) {
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printf("Step %c must be finished before step %c can begin.\n", step.name, step.requirements[j]);
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}
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}
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return -1;
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}
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int part_2(FILE *input) {
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rewind(input);
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return -1;
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}
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int main() {
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char *input_file_path = "../data/2018/7/input.txt";
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FILE *input = fopen(input_file_path, "r");
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if (input == NULL) {
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printf("Can't open file %s\n", input_file_path);
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return 1;
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}
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printf("Part 1: %d\n", part_1(input));
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printf("Part 2: %d\n", part_2(input));
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fclose(input);
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}
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