Task #R062C

Memory 16 MB Time 1000 ms Complexity 10 %

To'g'ri to'rtburchakda yotgan romblar

Sizga to'g'ri to'rtburchakning qarama-qarshi \(A(x1,y1)\) va \(B(x2,y2)\) uchlari koordinatalari beriladi. Siz shunday romblar sonini topishingiz kerakki, ularning uchlari to'g'ri to'rtburchak tomonlarining butun koordinatalarida yotsin va dioganallari koordinata o'qlariga parallel bo'lsin.

Input:

Birinchi qatorda probel bilan \(x_1, x_2.\)

Ikkinchi qatorda probel bilan \(y_1, y_2.\)

\(0 \leq x_1,x_2,y_1,y_2 \leq 10^9)\) kiritiladi.

Output:

Shartni qanoatlantiruvchi romblar soni toping.

Examples

#	input.txt	output.txt
1	0 2 2 0	1

Note:

To'g'ri to'rtburchak tomonlari koordinata o'qlariga parallel deb qaralsin !

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