aocc22

Advent of Code 2022
git clone git://www.tkruger.se/aocc22.git
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common.c (451B)

      1 #include "common.h"
      2 
      3 #define MAX_CYCLES 240
      4 
      5 int *parse(char **lines, size_t nlines) {
      6   int *r = malloc(MAX_CYCLES * sizeof(*r) + 2);
      7 
      8   r[0] = 1;
      9   int t;
     10   size_t i, j, c = 0;
     11   for (i = 0; i < nlines; i++) {
     12     if (lines[i][0] == 'n') {
     13       r[c + 1] = r[c];
     14       c++;
     15     } else {
     16       sscanf(lines[i], "addx %d\n", &t);
     17       r[c + 1] = r[c];
     18       r[c + 2] = r[c] + t;
     19       c += 2;
     20     }
     21 
     22     if (c >= 240)
     23       break;
     24   }
     25 
     26   return r;
     27 }