import struct

path = "/home/aria/kellogg_remake/raw/PCKELL.DAT"
data = open(path, "rb").read()

vals = []
off = 0
while off + 2 <= len(data):
    v = struct.unpack_from("<H", data, off)[0]
    vals.append(v)
    off += 2

start = 6  # skip first 6 uint16 (12 bytes) which look like a header
mono_len = start+1
for i in range(start+1, len(vals)):
    if vals[i] >= vals[i-1]:
        mono_len = i+1
    else:
        break

print("monotonic non-decreasing run starting at idx", start, "-> length", mono_len-start, "entries")
print("breaks at idx", mono_len, "byte offset", mono_len*2)
print("values around break:", vals[mono_len-5:mono_len+15])
print("last mono value:", vals[mono_len-1])