Ipzz-447

Kaito stood under the awning of a closed pachinko parlor, checking his watch. 11:47 PM.

Starting from the final b_16 = 0x4e5c0d3a3c1e0b2f and working backwards, we can recover each c_i . The easiest way is to brute‑force the 16‑byte input by forward simulation because the search space is tiny (each character is limited to printable ASCII that after - '0' stays in the range 0‑9; however the original code does not enforce that – any byte works). Therefore we can simply . ipzz-447