Rei Ayanami and Triangular Colony

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Ayanami lives in colony whose height and width is $N$ dekameter. The shape of the colony is a right angled triangle. There are horizontal and vertical roads running from left to right and top to bottom respectively at a distance of 1 dekameter each. Ayanami's house is located on the top end of the colony. Ayanami wants to go to the candy shop to buy some candies. The candy shop is located on the o

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solution.cppC++17

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