preliminary
...........\Ascii
...........\.....\ascii.cpp
...........\.....\ascii.in
...........\.....\ascii.out
...........\.....\a_hanshuai.cpp
...........\fix
...........\...\0.in
...........\...\0.out
...........\...\explain_e.docx
...........\...\Solution
...........\...\........\BruteForce_tle.cpp
...........\...\........\fix1_ac.cpp
...........\...\........\fix2_ac.cpp
...........\...\........\fix_greedy_wa.cpp
...........\...\........\f_hanshuai.cpp
...........\Gourd
...........\.....\0.in
...........\.....\0.out
...........\.....\Brute_force.cpp
...........\.....\explain_e.docx
...........\.....\g_hanshuai.cpp
...........\.....\Solution.cpp
...........\Guard
...........\.....\Guard.cpp
...........\.....\Guard.in
...........\.....\Guard.out
...........\Lanterns
...........\........\Lanterns.cpp
...........\........\Lanterns.in
...........\........\Lanterns.out
...........\........\Lanterns.txt
...........\........\Lanterns_xay.cpp
...........\New_Ground
...........\..........\new_ground.cpp
...........\..........\new_ground.in
...........\..........\new_ground.out
...........\..........\ng.cpp
...........\passage
...........\.......\passage.cpp
...........\.......\passage.in
...........\.......\passage.out
...........\.......\p_amr.java
...........\Pseudoforest
...........\............\pf_hanshuai.cpp
...........\............\Pseudoforest.cpp
...........\............\Pseudoforest.in
...........\............\Pseudoforest.out
...........\Reversi
...........\.......\reversi.cpp
...........\.......\reversi.in
...........\.......\reversi.out
...........\.......\rev_hanshuai.cpp
...........\robot
...........\.....\robot.cpp
...........\.....\robot.in
...........\.....\robot.out