Arjun quest to Vijay Dhanush

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Arjun, the greatest archer, third of the great Pandavas, is on a quest to find the greatest bow Vijay Dhanush to defeat Kauravas. In order to acquire the weapon, he has to face some hurdles. Arjun has entered the grid of size $10^{9} * 10^{9}$. The weapon is acquired on entering the row $10^{9}$. Arjun is currently on the cell $(1,1)$. There are some magical walls protecting the weapon. These wal

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solution.cppC++17

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