submit F.cpp to 'F - Takahashi's Basics in Education and Learning' (abc129) [C++14 (GCC 5.4.1)]
submit F.cpp to 'F - Takahashi's Basics in Education and Learning' (abc129) [C++14 (GCC 5.4.1)]

kazunetakahashi/atcoder,kazunetakahashi/atcoder