Index: aoc2024.c
==================================================================
--- aoc2024.c
+++ aoc2024.c
@@ -18,16 +18,23 @@
         err += 1; // skip '|'
         pagepair[npp][1] = strtoul(line, &err, 10);
         npp++;
         line = strtok(NULL, "\n");
     }
-    printf("first pagepair: %u and %u\n", pagepair[0][0], pagepair[0][1]);
-    printf("last pagepair: %u and %u\n", pagepair[npp - 1][0], pagepair[npp - 1][1]);
-    printf("got %u pairs\n", npp);
+    printf("%u\n", pagepair[0][0]);
+    unsigned update[512], nupdates, maxupdates = 0;
     while ((line = strtok(NULL, "\n")) != NULL) {
-        // process line
+        nupdates = 0;
+        char *err = line;
+        for (;;) {
+            update[nupdates++] = strtoul(err, &err, 10);
+            if (*err == ',') err++;
+            else break;
+        }
+        if (nupdates > maxupdates) maxupdates = nupdates;
     }
+    printf("%u nax updates\n", maxupdates);
 }
 static size_t rcmap(unsigned size, unsigned row, unsigned col) {
     return row * (size + 1) + col;
 }