Spiraali

#include <iostream>

struct Int2
{
	int x, y;
};

uint64_t GetSpiralValue(int size, const Int2& pos)
{
	// Bounds
	int x1 = 1;
	int x2 = size;
	int y1 = 0;
	int y2 = size;

	int x = 0, y = 0;
	char direction = 0;

	for (uint64_t i = 1; i <= (uint64_t)size * (uint64_t)size; i++)
	{
		if (pos.x == x && pos.y == y)
			return i;

		if (direction == 0)
		{
			y++;
			if (y == y2)
			{
				direction = 1;
				y2--;
				y--;
				x++;
			}
		}
		else if (direction == 1)
		{
			x++;
			if (x == x2)
			{
				direction = 2;
				x2--;
				y--;
				x--;
			}
		}
		else if (direction == 2)
		{
			y--;
			if (y < y1)
			{
				direction = 3;
				y1++;
				y++;
				x--;
			}
		}
		else if (direction == 3)
		{
			x--;
			if (x < x1)
			{
				direction = 0;
				x1++;
				y++;
				x++;
			}
		}
	}

	return -1;
}

int main()
{
	int n, t;
	std::cin >> n;
	std::cin >> t;
	
	Int2* positions = new Int2[t];

	for (int i = 0; i < t; i++)
	{
		int x, y;
		std::cin >> x;
		std::cin >> y;

		positions[i] = { y - 1, x - 1 };
	}

	for (int i = 0; i < t; i++)
	{
		auto& pos = positions[i];

		std::cout << GetSpiralValue(n, pos) << "\n";
	}

	delete[] positions;
}

Test 1

Group: 1

Verdict: ACCEPTED

Test 2

Group: 2

Verdict: ACCEPTED

Test 3

Group: 3

Verdict: TIME LIMIT EXCEEDED