Let your spirit soar and have a joy-filled new year by playing Ghenshin :D
However, before that, I will recommend to you an interesting "Genshin Geometry" problem
(Problem from the GYM The 2021 ICPC Asia Nanjing Regional Contest (XXII Open Cup, Grand Prix of Nanjing)).
So now, let's try to solve this problem by yourself...
. . . . . . . . . . . . . .
...before read some hints!
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