# preface

# Thanks to 空白 crazyman, who brough us so much excellent ctf exercises. (Though I didn’t work out many of them that is.) Now the HNCTF has ended, I found some write up about the python jail problemspythonJail.

# Changes of Python API in IDA 7.x

# codeforces 817E

# codeforces 1719C

# codeforces 1720C