소스 ¶

~cpp
#include <iostream>

using namespace std;

#define TRUE 1
#define FALSE 0

int GetYPoint(int x)
{
	
	return (3 * x * x) - (8 * x) + 6;
}

void GetMayaPoint(int& x, int& y, int remainNumber)
{
	const int PLUS_X[6] = {-1, +0, +1, +1, +0, -1};
	const int PLUS_Y[6] = {+0, -1, -1, +0, +1, +1};
	int circleNumber = --y;
	bool isAddOne = FALSE;
	for (register int i = 0; i < 6; ++i)
	{
		for (register int j = 0; j < circleNumber; ++j)
		{
			--remainNumber;
			if (0 > remainNumber)
				return;
			if (4 == i && FALSE == isAddOne)
			{
				--j;
				isAddOne = TRUE;
			}
			x += PLUS_X[i];
			y += PLUS_Y[i];
		}
	}
}

void main()
{
	int willyNumber;
	while(1)
	{
		cout << "0을 입력하면 종료됩니다. 윌리의 숫자를 입력하세요.\n>>";
		cin >> willyNumber;
		if (0 == willyNumber)
			break;

		int x = 0;
		int y = 1;
		for ( ; GetYPoint(y) <= willyNumber; ++y);
		--y;
		GetMayaPoint(x, y, willyNumber - GetYPoint(y));
		cout << "(" << x << ", " << y << ")" << endl;
	}
}