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Parachute rings

UnratedFunction
English

Language

Contribute a translation
Time limit
10000 ms
Memory limit
512 MB
Submissions
0
Correct
0
Solved by
0
AC rate
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Statement

Parachute rings: original English statement, page 1

Parachute rings: original English statement, page 2

Parachute rings: original English statement, page 3

Parachute rings: original English statement, page 4

Examples

Sample input 1
7 13
-1
1 2
-1
0 5
-1
2 0
-1
3 2
-1
3 5
-1
4 3
-1
Sample output 1
7
7
7
7
4
3
2

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Source

This problem accepts only these languages.

C++20