advent-of-code

commit ebc174add5feef05162d239ae56e69392aa91edf
parent 6bd8091226007557b581f55137cdd17f2e494aea
Author: aabacchus <ben@bvnf.space>
Date:   Sat, 10 Dec 2022 11:46:22 +0000

22.10 in C

Diffstat:
A
2022/10/a.c
 | 
82
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
A
2022/10/input
 | 
138
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

2 files changed, 220 insertions(+), 0 deletions(-)
diff --git a/2022/10/a.c b/2022/10/a.c
@@ -0,0 +1,82 @@
+#include <stdio.h>
+#include <stdlib.h>
+
+int
+check_clock(int c, int X) {
+    switch (c+1) {
+        case 20:
+        case 60:
+        case 100:
+        case 140:
+        case 180:
+        case 220:
+            return (c+1) * X;
+        default:
+            return 0;
+    }
+}
+
+void
+draw(int c, int X) {
+    int p = (c) % 40;
+    if (p == 0 && c != 0)
+        printf("\n");
+    if ((X-1) % 40 == p ||
+            (X) % 40 == p ||
+            (X+1) % 40 == p)
+        printf("#");
+    else
+        printf(".");
+}
+
+int
+main(int argc, char **argv) {
+    char *buf = NULL;
+    size_t buflen = 0;
+    ssize_t n;
+    FILE *f;
+
+    int X = 1;
+    int clock = 0;
+    int total = 0;
+
+    if (argc != 2) {
+        fprintf(stderr, "usage: %s input\n", argv[0]);
+        return 1;
+    }
+
+    f = fopen(argv[1], "r");
+    if (f == NULL) {
+        perror(argv[1]);
+        return 1;
+    }
+
+    draw(clock, X);
+    while ((n = getline(&buf, &buflen, f)) != -1) {
+        if (buf[n - 1] == '\n') {
+            buf[n - 1] = '\0';
+            n--;
+        }
+        if (buf[0] == 'a') {
+            int a;
+            if (sscanf(buf+5, "%d", &a) != 1) {
+                perror("sscanf");
+                return 1;
+            }
+            clock++;
+            total += check_clock(clock, X);
+            draw(clock, X);
+            X += a;
+        }
+        clock++;
+        total += check_clock(clock, X);
+        draw(clock, X);
+    }
+
+    printf("Part A: %d\n", total);
+
+    free(buf);
+    fclose(f);
+
+    return 0;
+}
diff --git a/2022/10/input b/2022/10/input
@@ -0,0 +1,138 @@
+noop
+noop
+addx 5
+addx 29
+addx -28
+addx 5
+addx -1
+noop
+noop
+addx 5
+addx 12
+addx -6
+noop
+addx 4
+addx -1
+addx 1
+addx 5
+addx -31
+addx 32
+addx 4
+addx 1
+noop
+addx -38
+addx 5
+addx 2
+addx 3
+addx -2
+addx 2
+noop
+addx 3
+addx 2
+addx 5
+addx 2
+addx 3
+noop
+addx 2
+addx 3
+noop
+addx 2
+addx -32
+addx 33
+addx -20
+addx 27
+addx -39
+addx 1
+noop
+addx 5
+addx 3
+noop
+addx 2
+addx 5
+noop
+noop
+addx -2
+addx 5
+addx 2
+addx -16
+addx 21
+addx -1
+addx 1
+noop
+addx 3
+addx 5
+addx -22
+addx 26
+addx -39
+noop
+addx 5
+addx -2
+addx 2
+addx 5
+addx 2
+addx 23
+noop
+addx -18
+addx 1
+noop
+noop
+addx 2
+noop
+noop
+addx 7
+addx 3
+noop
+addx 2
+addx -27
+addx 28
+addx 5
+addx -11
+addx -27
+noop
+noop
+addx 3
+addx 2
+addx 5
+addx 2
+addx 27
+addx -26
+addx 2
+addx 5
+addx 2
+addx 4
+addx -3
+addx 2
+addx 5
+addx 2
+addx 3
+addx -2
+addx 2
+noop
+addx -33
+noop
+noop
+noop
+noop
+addx 31
+addx -26
+addx 6
+noop
+noop
+addx -1
+noop
+addx 3
+addx 5
+addx 3
+noop
+addx -1
+addx 5
+addx 1
+addx -12
+addx 17
+addx -1
+addx 5
+noop
+noop
+addx 1
+noop
+noop