2022: Day 5 complete

2022/5.c

@@ -0,0 +1,220 @@
+#include <ctype.h>
+#include <stddef.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#define MAX_LINE 512
+#define NUM_LINES 512
+#define NUM_STACKS 9
+
+struct Stack {
+  int top;
+  char items[MAX_LINE];
+};
+typedef struct Stack stack;
+
+// Push onto a stack
+void push(stack *st, char crate) {
+  if (st->top == MAX_LINE) {
+    fprintf(stderr, "Stack is full\n");
+  } else {
+    st->top++;
+    st->items[st->top] = crate;
+  }
+}
+
+// Pop from a stack
+char pop(stack *st) {
+  char c = '\0';
+  if (st->top == -1) {
+    fprintf(stderr, "Stack is empty\n");
+    return -1;
+  } else {
+    c = st->items[st->top];
+    st->items[st->top] = '\0';
+    st->top--;
+    return c;
+  }
+}
+
+// Prints top index, top item, and each stack
+void print_crates(stack **crates) {
+  for (size_t i = 0; i < NUM_STACKS; i++) {
+    printf("\nStack %lu - Top: %d"
+           "\n          Top Crate: %c"
+           "\n          Crates: %s\n",
+           i + 1, crates[i]->top, crates[i]->items[crates[i]->top],
+           crates[i]->items);
+    fflush(stdout);
+  }
+}
+
+// Allocate memeory and initialize stacks of crates with their initial order
+stack **crates_init() {
+
+  stack **crates = calloc(NUM_STACKS, sizeof(stack *));
+  if (crates == NULL) {
+    return NULL;
+  }
+
+  for (int i = 0; i < NUM_STACKS; i++) {
+    crates[i] = (stack *)malloc(sizeof(stack));
+    if (crates[i] == NULL) {
+      return NULL;
+    }
+    crates[i]->top = -1;
+    memset(crates[i]->items, 0, MAX_LINE);
+  }
+
+  crates[0]->top = 7;
+  strcpy(crates[0]->items, "PFMQWGRT");
+  crates[1]->top = 2;
+  strcpy(crates[1]->items, "HFR");
+  crates[2]->top = 7;
+  strcpy(crates[2]->items, "PZRVGHSD");
+  crates[3]->top = 6;
+  strcpy(crates[3]->items, "QHPBFWG");
+  crates[4]->top = 4;
+  strcpy(crates[4]->items, "PSMJH");
+  crates[5]->top = 7;
+  strcpy(crates[5]->items, "MZTHSRPL");
+  crates[6]->top = 5;
+  strcpy(crates[6]->items, "PTHNML");
+  crates[7]->top = 3;
+  strcpy(crates[7]->items, "FDQR");
+  crates[8]->top = 6;
+  strcpy(crates[8]->items, "DSCNLPH");
+
+  return crates;
+}
+
+// Parses moves from input file and stores in an array
+void parse_moves(FILE *file, int moves[NUM_LINES][3], size_t *line_num) {
+
+  int idx = 0;
+  char line[MAX_LINE] = {0};
+
+  while (fgets(line, MAX_LINE, file) != NULL) {
+
+    if (line[0] != 'm') {
+      memset(line, 0, MAX_LINE);
+      continue;
+    }
+
+    for (size_t i = 0; i < strlen(line); i++) {
+      if (isdigit(line[i])) {
+        if (isdigit(line[i + 1])) {
+          char temp[2];
+          temp[0] = line[i];
+          temp[1] = line[i + 1];
+          moves[*line_num][idx] = atoi(temp);
+          i++;
+        } else {
+          moves[*line_num][idx] = atoi(&line[i]);
+        }
+        idx++;
+        if (idx > 2) {
+          *line_num += 1;
+          idx = 0;
+        }
+      }
+    }
+    memset(line, 0, MAX_LINE);
+  }
+}
+
+// Part 1 - Processes each move stored in the moves array one crate at a time
+void part1_moves(stack **crates, int moves[NUM_LINES][3], size_t move_count) {
+
+  size_t idx = 0;
+  while (idx <= move_count) {
+
+    for (int i = 0; i < moves[idx][0]; i++) {
+
+      char c = pop(crates[moves[idx][1] - 1]);
+      if (c == -1) {
+        fprintf(stderr, "part1_moves: move num: %lu", idx);
+        continue;
+      }
+
+      push(crates[moves[idx][2] - 1], c);
+    }
+    idx++;
+  }
+}
+
+void crates_free(stack **crates) {
+  for (size_t i = 0; i < NUM_STACKS; i++) {
+    free(crates[i]);
+  }
+  free(crates);
+}
+
+// Part 2 - Processes the moves array multiple crates at a time
+void part2_moves(stack **crates, int moves[NUM_LINES][3], size_t move_count) {
+
+  size_t idx = 0;
+  while (idx <= move_count) {
+
+    char c_arr[moves[idx][0]];
+    memset(c_arr, 0, moves[idx][0]);
+
+    for (int i = 0; i < moves[idx][0]; i++) {
+      c_arr[i] = pop(crates[moves[idx][1] - 1]);
+      if (c_arr[i] == -1) {
+        fprintf(stderr, "part2_moves: move num: %lu", idx);
+        continue;
+      }
+    }
+
+    for (int j = moves[idx][0] - 1; j >= 0; j--) {
+      push(crates[moves[idx][2] - 1], c_arr[j]);
+    }
+    idx++;
+  }
+}
+
+int main(int argc, char *argv[]) {
+
+  if (argc != 2) {
+    fprintf(stderr, "USAGE: %s input_file\n", argv[0]);
+    return 1;
+  }
+
+  FILE *file = fopen(argv[1], "r");
+  if (!file) {
+    perror("fopen");
+    return 1;
+  }
+
+  size_t move_count = 0;
+  int moves[NUM_LINES][3] = {0};
+  stack **crates = crates_init();
+  if (crates == NULL) {
+    fprintf(stderr, "Part 2: unable to allocate memory for crates\n");
+    fclose(file);
+    return 1;
+  }
+
+  printf("\n--- PART 1 ---\n");
+  parse_moves(file, moves, &move_count);
+  part1_moves(crates, moves, move_count);
+  print_crates(crates);
+
+  printf("\n--- PART 2 ---\n");
+  crates_free(crates);
+  crates = crates_init();
+  if (crates == NULL) {
+    fprintf(stderr, "Part 2: unable to allocate memory for crates\n");
+    fclose(file);
+    return 1;
+  }
+
+  part2_moves(crates, moves, move_count);
+  print_crates(crates);
+  crates_free(crates);
+
+  fclose(file);
+  return 0;
+}

2022/5.txt

@@ -0,0 +1,512 @@
+[T]     [D]         [L]            
+[R]     [S] [G]     [P]         [H]
+[G]     [H] [W]     [R] [L]     [P]
+[W]     [G] [F] [H] [S] [M]     [L]
+[Q]     [V] [B] [J] [H] [N] [R] [N]
+[M] [R] [R] [P] [M] [T] [H] [Q] [C]
+[F] [F] [Z] [H] [S] [Z] [T] [D] [S]
+[P] [H] [P] [Q] [P] [M] [P] [F] [D]
+ 1   2   3   4   5   6   7   8   9 
+
+move 3 from 8 to 9
+move 2 from 2 to 8
+move 5 from 4 to 2
+move 7 from 1 to 4
+move 3 from 8 to 2
+move 3 from 2 to 7
+move 1 from 7 to 4
+move 3 from 2 to 9
+move 4 from 7 to 9
+move 1 from 5 to 2
+move 2 from 3 to 4
+move 5 from 9 to 5
+move 6 from 9 to 3
+move 5 from 9 to 5
+move 1 from 9 to 7
+move 2 from 3 to 1
+move 7 from 3 to 9
+move 2 from 7 to 2
+move 5 from 2 to 4
+move 1 from 2 to 9
+move 2 from 1 to 9
+move 7 from 6 to 1
+move 2 from 7 to 3
+move 2 from 3 to 9
+move 1 from 7 to 4
+move 1 from 9 to 2
+move 3 from 1 to 8
+move 2 from 3 to 4
+move 5 from 9 to 2
+move 1 from 3 to 9
+move 8 from 5 to 7
+move 1 from 6 to 1
+move 15 from 4 to 1
+move 4 from 2 to 5
+move 5 from 9 to 7
+move 1 from 9 to 5
+move 5 from 1 to 2
+move 3 from 8 to 9
+move 1 from 7 to 6
+move 11 from 1 to 2
+move 7 from 5 to 3
+move 4 from 2 to 6
+move 7 from 3 to 4
+move 3 from 5 to 9
+move 2 from 2 to 5
+move 5 from 1 to 8
+move 2 from 6 to 8
+move 3 from 8 to 9
+move 9 from 4 to 9
+move 9 from 7 to 4
+move 2 from 8 to 1
+move 1 from 8 to 7
+move 6 from 2 to 7
+move 5 from 2 to 4
+move 5 from 7 to 2
+move 2 from 1 to 7
+move 2 from 6 to 4
+move 7 from 7 to 1
+move 3 from 2 to 6
+move 1 from 8 to 7
+move 2 from 9 to 3
+move 2 from 3 to 1
+move 1 from 2 to 5
+move 4 from 6 to 5
+move 2 from 2 to 3
+move 3 from 5 to 7
+move 1 from 5 to 3
+move 9 from 1 to 7
+move 2 from 9 to 5
+move 13 from 4 to 1
+move 5 from 7 to 2
+move 3 from 3 to 1
+move 2 from 2 to 9
+move 1 from 2 to 7
+move 5 from 5 to 6
+move 2 from 2 to 4
+move 5 from 1 to 3
+move 9 from 7 to 8
+move 2 from 9 to 5
+move 3 from 5 to 4
+move 5 from 9 to 2
+move 10 from 4 to 8
+move 1 from 4 to 1
+move 2 from 8 to 4
+move 4 from 8 to 2
+move 3 from 6 to 8
+move 7 from 8 to 7
+move 10 from 9 to 3
+move 7 from 3 to 2
+move 11 from 2 to 3
+move 13 from 3 to 9
+move 1 from 6 to 3
+move 1 from 1 to 2
+move 1 from 2 to 8
+move 3 from 3 to 4
+move 1 from 2 to 9
+move 1 from 4 to 1
+move 10 from 8 to 3
+move 11 from 9 to 7
+move 1 from 6 to 2
+move 14 from 7 to 1
+move 2 from 2 to 9
+move 4 from 7 to 6
+move 1 from 2 to 4
+move 3 from 4 to 2
+move 4 from 2 to 9
+move 10 from 3 to 4
+move 3 from 6 to 1
+move 5 from 9 to 5
+move 5 from 5 to 8
+move 1 from 9 to 7
+move 2 from 9 to 6
+move 1 from 9 to 8
+move 2 from 4 to 8
+move 1 from 4 to 5
+move 2 from 3 to 1
+move 2 from 3 to 7
+move 27 from 1 to 2
+move 2 from 7 to 1
+move 9 from 4 to 6
+move 9 from 6 to 5
+move 5 from 8 to 6
+move 26 from 2 to 3
+move 1 from 2 to 5
+move 1 from 2 to 7
+move 1 from 8 to 4
+move 1 from 7 to 8
+move 24 from 3 to 5
+move 1 from 8 to 5
+move 1 from 4 to 3
+move 1 from 7 to 1
+move 1 from 8 to 9
+move 7 from 1 to 7
+move 8 from 6 to 4
+move 4 from 7 to 6
+move 1 from 3 to 9
+move 2 from 9 to 1
+move 3 from 7 to 9
+move 8 from 4 to 6
+move 3 from 9 to 1
+move 1 from 3 to 6
+move 1 from 8 to 2
+move 10 from 5 to 4
+move 1 from 3 to 8
+move 13 from 5 to 3
+move 1 from 2 to 9
+move 1 from 8 to 9
+move 1 from 3 to 8
+move 1 from 9 to 2
+move 3 from 6 to 9
+move 7 from 4 to 9
+move 4 from 3 to 9
+move 2 from 6 to 8
+move 2 from 4 to 5
+move 10 from 9 to 3
+move 1 from 1 to 9
+move 1 from 4 to 8
+move 1 from 1 to 4
+move 1 from 4 to 5
+move 4 from 6 to 3
+move 1 from 9 to 5
+move 1 from 6 to 9
+move 2 from 6 to 5
+move 1 from 9 to 2
+move 1 from 6 to 7
+move 18 from 5 to 2
+move 22 from 3 to 7
+move 19 from 7 to 1
+move 3 from 8 to 5
+move 4 from 9 to 3
+move 2 from 7 to 2
+move 1 from 8 to 1
+move 19 from 1 to 3
+move 2 from 7 to 5
+move 13 from 3 to 9
+move 4 from 1 to 2
+move 3 from 5 to 1
+move 11 from 9 to 1
+move 11 from 2 to 8
+move 3 from 9 to 3
+move 3 from 5 to 2
+move 2 from 1 to 4
+move 5 from 2 to 7
+move 12 from 1 to 5
+move 2 from 4 to 5
+move 9 from 5 to 8
+move 1 from 5 to 3
+move 4 from 2 to 3
+move 2 from 7 to 5
+move 6 from 2 to 8
+move 17 from 8 to 9
+move 2 from 9 to 6
+move 2 from 7 to 1
+move 15 from 9 to 6
+move 2 from 2 to 4
+move 9 from 8 to 5
+move 2 from 1 to 3
+move 12 from 6 to 2
+move 2 from 3 to 9
+move 5 from 6 to 3
+move 4 from 5 to 3
+move 11 from 3 to 4
+move 2 from 9 to 4
+move 6 from 5 to 2
+move 13 from 4 to 3
+move 1 from 4 to 5
+move 1 from 4 to 8
+move 18 from 2 to 6
+move 2 from 5 to 3
+move 1 from 8 to 3
+move 1 from 2 to 5
+move 1 from 7 to 8
+move 28 from 3 to 6
+move 2 from 3 to 4
+move 3 from 5 to 9
+move 2 from 5 to 9
+move 3 from 9 to 3
+move 5 from 3 to 4
+move 1 from 9 to 3
+move 1 from 9 to 1
+move 1 from 3 to 4
+move 45 from 6 to 2
+move 1 from 8 to 3
+move 2 from 4 to 6
+move 5 from 4 to 2
+move 1 from 3 to 7
+move 3 from 2 to 9
+move 1 from 4 to 8
+move 3 from 6 to 1
+move 42 from 2 to 8
+move 2 from 9 to 2
+move 4 from 2 to 6
+move 2 from 2 to 7
+move 1 from 9 to 6
+move 2 from 8 to 9
+move 4 from 1 to 8
+move 1 from 6 to 4
+move 1 from 4 to 8
+move 1 from 2 to 5
+move 3 from 7 to 4
+move 39 from 8 to 3
+move 7 from 8 to 5
+move 8 from 5 to 7
+move 35 from 3 to 1
+move 4 from 3 to 7
+move 10 from 7 to 2
+move 2 from 9 to 6
+move 3 from 4 to 2
+move 1 from 7 to 5
+move 1 from 7 to 8
+move 1 from 5 to 4
+move 12 from 1 to 6
+move 1 from 8 to 1
+move 1 from 4 to 5
+move 14 from 6 to 8
+move 9 from 8 to 6
+move 5 from 6 to 1
+move 11 from 2 to 9
+move 1 from 9 to 8
+move 6 from 8 to 3
+move 6 from 9 to 2
+move 8 from 1 to 9
+move 3 from 3 to 6
+move 7 from 1 to 4
+move 1 from 5 to 9
+move 8 from 9 to 8
+move 7 from 6 to 8
+move 1 from 9 to 3
+move 3 from 6 to 4
+move 3 from 9 to 1
+move 4 from 3 to 2
+move 1 from 6 to 7
+move 1 from 4 to 2
+move 13 from 1 to 7
+move 6 from 4 to 8
+move 1 from 7 to 3
+move 1 from 4 to 6
+move 1 from 9 to 5
+move 1 from 3 to 5
+move 19 from 8 to 9
+move 1 from 6 to 5
+move 6 from 9 to 2
+move 2 from 5 to 8
+move 1 from 5 to 2
+move 4 from 1 to 4
+move 8 from 9 to 4
+move 3 from 9 to 8
+move 2 from 9 to 1
+move 6 from 7 to 5
+move 12 from 4 to 2
+move 6 from 8 to 3
+move 1 from 4 to 1
+move 1 from 3 to 1
+move 13 from 2 to 3
+move 4 from 5 to 3
+move 1 from 4 to 9
+move 1 from 8 to 9
+move 12 from 3 to 2
+move 1 from 9 to 1
+move 2 from 5 to 9
+move 3 from 9 to 5
+move 1 from 7 to 5
+move 3 from 7 to 3
+move 1 from 5 to 4
+move 1 from 5 to 8
+move 9 from 2 to 3
+move 2 from 2 to 3
+move 3 from 1 to 9
+move 1 from 8 to 9
+move 3 from 9 to 1
+move 9 from 2 to 6
+move 1 from 9 to 5
+move 6 from 2 to 3
+move 2 from 6 to 9
+move 3 from 6 to 3
+move 1 from 4 to 3
+move 2 from 9 to 6
+move 2 from 7 to 2
+move 2 from 2 to 8
+move 24 from 3 to 7
+move 2 from 5 to 6
+move 2 from 8 to 2
+move 7 from 2 to 8
+move 8 from 3 to 6
+move 2 from 1 to 3
+move 1 from 1 to 2
+move 1 from 5 to 2
+move 15 from 7 to 4
+move 9 from 7 to 9
+move 7 from 9 to 1
+move 5 from 8 to 1
+move 4 from 1 to 4
+move 19 from 4 to 3
+move 22 from 3 to 5
+move 1 from 7 to 5
+move 9 from 5 to 4
+move 6 from 1 to 3
+move 6 from 3 to 1
+move 4 from 5 to 4
+move 1 from 2 to 1
+move 1 from 2 to 6
+move 4 from 6 to 1
+move 1 from 3 to 6
+move 3 from 6 to 3
+move 2 from 9 to 8
+move 2 from 5 to 3
+move 2 from 5 to 1
+move 10 from 6 to 4
+move 4 from 4 to 9
+move 7 from 4 to 3
+move 2 from 8 to 7
+move 4 from 9 to 3
+move 5 from 5 to 7
+move 1 from 5 to 1
+move 1 from 6 to 3
+move 1 from 8 to 4
+move 1 from 8 to 3
+move 13 from 4 to 5
+move 1 from 1 to 8
+move 6 from 5 to 3
+move 1 from 7 to 6
+move 5 from 7 to 6
+move 9 from 1 to 8
+move 1 from 8 to 4
+move 1 from 7 to 1
+move 1 from 4 to 1
+move 5 from 3 to 7
+move 3 from 7 to 9
+move 1 from 5 to 4
+move 6 from 8 to 6
+move 1 from 9 to 3
+move 2 from 9 to 5
+move 7 from 5 to 9
+move 1 from 7 to 5
+move 2 from 5 to 3
+move 10 from 6 to 8
+move 2 from 6 to 1
+move 1 from 4 to 9
+move 1 from 7 to 5
+move 8 from 8 to 2
+move 1 from 1 to 7
+move 1 from 9 to 7
+move 1 from 5 to 1
+move 3 from 9 to 8
+move 7 from 8 to 7
+move 6 from 7 to 1
+move 1 from 8 to 7
+move 4 from 7 to 1
+move 16 from 3 to 7
+move 4 from 3 to 1
+move 5 from 7 to 8
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+move 9 from 1 to 7
+move 1 from 3 to 4
+move 15 from 4 to 8
+move 1 from 3 to 1
+move 2 from 1 to 6
+move 2 from 4 to 9
+move 17 from 8 to 2
+move 6 from 9 to 5
+move 8 from 7 to 8
+move 2 from 6 to 9
+move 4 from 5 to 7
+move 2 from 8 to 5
+move 1 from 5 to 9
+move 11 from 2 to 6
+move 4 from 6 to 1
+move 5 from 2 to 8
+move 2 from 9 to 2
+move 1 from 9 to 3
+move 3 from 1 to 8
+move 1 from 3 to 6
+move 7 from 6 to 9
+move 2 from 5 to 4
+move 6 from 7 to 4
+move 4 from 8 to 1
+move 1 from 5 to 2
+move 1 from 6 to 1
+move 7 from 9 to 8
+move 2 from 7 to 9
+move 9 from 2 to 9
+move 5 from 9 to 3
+move 3 from 2 to 8
+move 4 from 8 to 7
+move 9 from 7 to 2
+move 3 from 1 to 3
+move 14 from 8 to 1
+move 2 from 8 to 3
+move 1 from 9 to 4
+move 3 from 7 to 9
+move 8 from 3 to 9
+move 2 from 2 to 7
+move 12 from 1 to 8
+move 4 from 1 to 6
+move 2 from 6 to 7
+move 1 from 6 to 7
+move 9 from 4 to 7
+move 9 from 7 to 4
+move 1 from 1 to 6
+move 2 from 3 to 6
+move 2 from 6 to 8
+move 12 from 9 to 8
+move 2 from 6 to 9
+move 2 from 9 to 7
+move 1 from 8 to 5
+move 5 from 7 to 5
+move 1 from 9 to 1
+move 3 from 4 to 1
+move 5 from 4 to 8
+move 4 from 1 to 7
+move 1 from 4 to 2
+move 19 from 8 to 4
+move 2 from 7 to 5
+move 14 from 8 to 5
+move 2 from 7 to 8
+move 3 from 9 to 8
+move 19 from 4 to 2
+move 9 from 2 to 4
+move 2 from 7 to 8
+move 15 from 5 to 9
+move 15 from 9 to 8
+move 1 from 5 to 9
+move 11 from 8 to 7
+move 4 from 5 to 8
+move 1 from 5 to 9
+move 2 from 9 to 5
+move 2 from 2 to 6
+move 14 from 2 to 9
+move 12 from 8 to 9
+move 3 from 8 to 4
+move 7 from 9 to 2
+move 4 from 7 to 9
+move 1 from 6 to 9
+move 1 from 7 to 5
+move 1 from 6 to 2
+move 3 from 5 to 4
+move 19 from 9 to 4
+move 1 from 5 to 1
+move 1 from 9 to 8
+move 1 from 1 to 7
+move 1 from 8 to 9
+move 4 from 7 to 2
+move 3 from 7 to 6
+move 18 from 4 to 2
+move 17 from 2 to 3
+move 2 from 6 to 8
+move 17 from 3 to 6
+move 13 from 2 to 1
+move 2 from 8 to 3
+move 2 from 2 to 9
+move 6 from 1 to 9
+move 1 from 3 to 4
+move 1 from 3 to 9
+move 8 from 6 to 4
+move 20 from 4 to 8
+move 3 from 4 to 8
+move 15 from 8 to 2
+move 11 from 2 to 6
+move 2 from 1 to 7
+move 7 from 9 to 8
+move 6 from 9 to 3
+move 1 from 6 to 5