add aoc 2022

1 files changed, 62 insertions, 0 deletions

diff --git a/advent-of-code/2022/10/2.c b/advent-of-code/2022/10/2.c
new file mode 100644
index 0000000..1abcb7e
--- /dev/null
+++ b/advent-of-code/2022/10/2.c
@@ -0,0 +1,62 @@
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <stdbool.h>
+
+#include <str.h>
+
+char screen[6][40];
+
+int regx = 0;
+int time = 0;
+
+void process() {
+    if (time >= 240) return;
+    int delta = time % 40 - regx;
+    if (delta <= 2 && delta >= 0) {
+        screen[time / 40][time % 40] = '#';
+    }
+}
+
+void tick(int value) {
+    process();
+    time++;
+    regx += value;
+}
+
+int main() {
+    memset(screen, '.', 240);
+    FILE *fp = fopen("input", "r");
+    while (true) {
+        char *rawline = fgetline(fp);
+        if (rawline == NULL) break;
+        char *line = str_strip(rawline);
+        free(rawline);
+        char** words = str_split(line, ' ');
+        if (words == NULL) {
+            free(line);
+            continue;
+        }
+        if (words[0] == NULL) {
+            free(line); free(words);
+            continue;
+        }
+        if (strcmp(words[0], "noop") == 0) {
+            tick(0);
+        } else if (strcmp(words[0], "addx") == 0) {
+            tick(0);
+            char *ptr;
+            int value = strtol(words[1], &ptr, 10);
+            tick(value);
+        }
+        str_list_free(words);
+        free(line);
+    }
+    for (int i = 0; i < 6; i++) {
+        for (int j = 0; j < 40; j++) {
+            printf("%c", screen[i][j]);
+        }
+        printf("\n");
+    }
+    return 0;
+}