Index: aoc2024.c
==================================================================
--- aoc2024.c
+++ aoc2024.c
@@ -9,11 +9,11 @@
 
 /* === aoc202407 =======================================================
    Part one looks easy
 ===================================================================== */
 
-static bool canbetrue(unsigned v, unsigned *a, size_t n) {
+static bool canbetrue(unsigned long long v, unsigned long long *a, size_t n) {
     // for startes let's assume no overflowing
     if (n == 1) return (v == *a);
     unsigned tmp = a[1];
     a[1] = a[0] + tmp;
     if (canbetrue(v, a+1, n-1)) return true;
@@ -23,26 +23,25 @@
     return false;
 }
 
 void aoc202407(char *data, size_t len) {
     (void)len; // unused argument
-    unsigned calibrationtotal = 0;
+    unsigned long long calibrationtotal = 0;
     char *line = strtok(data, "\n");
-    unsigned number[50], nnumber, maxn = 0;
+    unsigned long long number[50], nnumber;
     while (line) {
         char *err;
-        unsigned testvalue = strtoul(line, &err, 10);
+        unsigned long long testvalue = strtoull(line, &err, 10);
         err += 1; // skip ':'
         nnumber = 0;
         while (*err == ' ') {
             number[nnumber++] = strtoul(err, &err, 10);
         }
         if (canbetrue(testvalue, number, nnumber)) calibrationtotal += testvalue;
-        if (nnumber > maxn) { maxn = nnumber; printf("max: %u\n", maxn); }
         line = strtok(NULL, "\n");
     }
-    printf("The calibration total is {%u}.\n", calibrationtotal);
+    printf("The calibration total is {%llu}.\n", calibrationtotal);
 }
 
 /* === aoc202406 =======================================================
    Hmmm, I've done something like this already this year... on day 4
    I need rcmap() moved to aocutils ... done; now it's called `linearize2d`