acmsguru |
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Закончено |
+ L R' adds a segment from point L to point R. You program should print the number of segments that are (non-strictly) inside the new one.
- L R' removes one segment from point L to point R. If there is no such segment, ignore this query.
- L R' or '
+ L R', where L and R are integers (-109 ≤ L < R ≤ 109). There will be no more than 250 · 103 queries.
+ L R' query, containing the number of segments inside the added segment.
sample input | sample output |
+ 1 2 + 1 2 + 0 3 - 1 2 + 1 2 | 0 1 2 1 |
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