delete pics to save space

2.808.cpp

@@ -0,0 +1,51 @@
+#include<stdio.h>
+#include<string.h>
+#include<stdlib.h>
+#include<math.h>
+const int N = 20005;
+const int d[5][2] = {{-1, 1}, {0, 2}, {1, 1}, {1, -1}, {0, -2}};
+struct Point {
+	int x, y;
+	Point() {}
+	Point(int _x, int _y) {
+		x = _x; y = _y;
+	}
+} p[N];
+
+int a, b;
+
+void init() {
+	int pn = 1, x = 0, y = 0;
+	p[pn++] = Point(x, y);
+	y -= 2;
+	p[pn++] = Point(x, y);
+	for (int i = 1; i <= 60; i++) {
+		int j, k;
+		for (j = 0; j < 5; j++) {
+			for (k = 0; k < i; k++) {
+				x += d[j][0]; y += d[j][1];
+				p[pn++] = Point(x, y);
+			}
+		}
+		y -= 2;
+		p[pn++] = Point(x, y);
+		for (j = 0; j < i; j++) {
+			x--; y--;
+			p[pn++] = Point(x, y);
+		}
+	}
+}
+
+int main()
+{
+	init();
+	while (~scanf("%d%d", &a, &b) && a || b)
+	{
+		int x = abs(p[a].x - p[b].x);
+		int y = abs(p[a].y - p[b].y);
+		printf("The distance between cells %d and %d is ", a, b);
+		if (y <= x) printf("%d.\n", x);
+		else printf("%d.\n", x + (y - x) / 2);
+	}
+	return 0;
+}