Day10

day10/input.txt

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+addx 1
+addx 4
+noop
+noop
+noop
+addx 5
+addx 3
+noop
+addx 2
+noop
+noop
+noop
+noop
+addx 3
+addx 5
+addx 2
+addx 1
+noop
+addx 5
+addx -1
+addx 5
+noop
+addx 3
+noop
+addx -40
+noop
+addx 38
+addx -31
+addx 3
+noop
+addx 2
+addx -7
+addx 8
+addx 2
+addx 5
+addx 2
+addx 3
+addx -2
+noop
+noop
+noop
+addx 5
+addx 2
+noop
+addx 3
+addx 2
+noop
+addx 3
+addx -36
+noop
+noop
+addx 5
+noop
+noop
+addx 8
+addx -5
+addx 5
+addx 2
+addx -15
+addx 16
+addx 4
+noop
+addx 1
+noop
+noop
+addx 4
+addx 5
+addx -30
+addx 35
+addx -1
+addx 2
+addx -36
+addx 5
+noop
+noop
+addx -2
+addx 5
+addx 2
+addx 3
+noop
+addx 2
+noop
+noop
+addx 5
+noop
+addx 14
+addx -13
+addx 5
+addx -14
+addx 18
+addx 3
+addx 2
+addx -2
+addx 5
+addx -40
+noop
+addx 32
+addx -25
+addx 3
+noop
+addx 2
+addx 3
+addx -2
+addx 2
+addx 2
+noop
+addx 3
+addx 5
+addx 2
+addx 9
+addx -36
+addx 30
+addx 5
+addx 2
+addx -25
+addx 26
+addx -38
+addx 10
+addx -3
+noop
+noop
+addx 22
+addx -16
+addx -1
+addx 5
+addx 3
+noop
+addx 2
+addx -20
+addx 21
+addx 3
+addx 2
+addx -24
+addx 28
+noop
+addx 5
+addx 3
+noop
+addx -24
+noop

day10/proci.c

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+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#define BUFFER_SIZE 64
+#define INTERESTING_CYCLES 20, 60, 100, 140, 180, 220
+#define CRT_WIDTH 40
+#define CRT_HEIGHT 6
+
+int main() {
+    char buf[BUFFER_SIZE], *p, c;
+    memset(buf, 0, BUFFER_SIZE);
+    p = buf;
+
+    int X = 1, cycle = 0, sum = 0, add, delay = 0;
+    int interesting_cycles[] = {INTERESTING_CYCLES};
+    int row =0, col = 0;
+
+    while ((c = getchar()) != EOF) {
+        *p++ = c;
+        if (c == '\n') {
+
+
+            if (sscanf(buf, "addx %i", &add)) {
+                delay = 2;
+            } else {
+                add = 0;
+                delay = 1;
+            }
+
+            while (delay > 0) {
+                cycle++;
+                if (col == CRT_WIDTH) {
+                    printf("\n");
+                    col = 0;
+                    row++;
+                }
+                if (X - 1 == col || X == col || X + 1 == col) {
+                    printf("#");
+                } else {
+                    printf(".");
+                }
+                // Update sum if we are in the right cycle
+                for (int i = 0; i < sizeof(interesting_cycles)/sizeof(int); i++) {
+                    if (interesting_cycles[i] == cycle) {
+                        sum += X * cycle;
+                    }
+                }
+
+                col++;
+                delay--;
+            }
+
+            X += add;
+
+            memset(buf, 0, BUFFER_SIZE);
+            p = buf;
+        }
+    }
+
+    printf("\n%i\n", sum);
+}