description, also make it 64 bit

include/utils.hpp

@@ -7,7 +7,8 @@
 
 #define FILL_CHAR ' '
 
-#define fastReadNum(path, val) readFile2(path, buf, sizeof(buf)); val = strtol(buf, NULL, 10)
+// wrapper around readFile2 func so we can avoid readFile and reuse one buffer, this should be faster and less bug prone?
+#define fastReadNum(path, val) readFile2(path, buf, sizeof(buf)); val = strtoll(buf, NULL, 10)
 
 // pretty prints num with given decs, 0 by default. its basically a macro so we inline it
 inline std::string pNum(auto num, uint8_t decs = 0) { return std::format("{:.{}f}", num, decs); }