Anton And Lines

easy
Question Solve Solutions 
<a href="https://codeforces.com/contest/593/problem/B">https://codeforces.com/contest/593/problem/B</a>

Input Format

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Output Format

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Constraints

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Notice

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Example

Input
4
1 2
1 2
1 0
0 1
0 2
Output
NO
Previous
Rectangles

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