神秘代码：键盘冒奶冒咖啡
A:https://vjudge.net/contest/377090#problem/A
B:https://vjudge.net/contest/377090#problem/B
D:https://vjudge.net/contest/377090#problem/D
E:https://vjudge.net/contest/377090#problem/E
F:https://vjudge.net/contest/377090#problem/F
G:https://vjudge.net/contest/377090#problem/G
开坑，感觉是个天坑