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20/12/2024 13:00:17
Занятие 12
J
Реализация заданного алгоритмаОлимпиадные задачи на английском языке
| 05/12/2007 | Занятие 12 (задачи NEERC 2007) (J) |
| 10/07/2020 | Летние сборы - 6 (командное) (J) |
Ограничения: время – 2s/4s, память – 64MiB Ввод: input.txt или стандартный ввод Вывод: output.txt или стандартный вывод 
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Michael had visited ACM ICPC World Finals 2007 in Tokyo, Japan and became fascinated with Japanese
writing. He decided to study hieroglyphs, but in order to check his knowledge he needs a piece of software
that can verify correctness of his writing. This program takes a description of a correct shape of the
hieroglyph, several Michael's attempts to write it, and judges each attempt as correct or incorrect.
In this problem hieroglyphs are represented as a collection of strokes, each stroke being a straight line on
a Cartesian plane. The order of strokes is irrelevant for the hieroglyph shape, but the direction of each
stroke is relevant. There are eight relevant directions: straight right, upper-right, straight up, upper-left,
straight left, lower-left, straight down, and lower-right.
Two writings are considered to represent the same shape if one-to-one correspondence can be established
between the strokes and all the endpoints of the strokes, so that direction of strokes and relative positions
of pairs of points are preserved. Preservation of relative positions is important for any pair of points,
even if they are not connected with a stroke. However, relative positions are important only with respect
to eight relevant directions described above.
For example, here is a hieroglyph similar to Latin letter A with 5 endpoints connected with 3 strokes and
several other correct writings of the same shape:
Note, that intersections of strokes are not relevant. Here are several incorrect writings of the same shape:
These writings are not correct for the following reasons:
- Writing 5 has an extra point, so one-to-one correspondence between end points cannot be established.
- In writing 6 point d is straight up from point a but it should be to the upper-right of it.
- In writing 7 stroke d-e goes in the wrong direction.
- In writing 8 point c is lower-right from point a but it should be straight to the right of it.
- Writing 9 has an extra a – d stroke, so one-to-one correspondence between strokes cannot be established.
Input
The first line of the input file contains a single integer `n` (`2\ ≤\ n\ ≤\ 20`) – the number of writings in the
input file. It is followed by descriptions of `n` writings.
Each writing starts with a line with a single integer number `m_i` (`1\ ≤\ m_i\ ≤\ 100`) – the number of strokes
in `i`-th writing. It is followed by `m_i` lines that describe strokes for `i`-th writing. Each stroke is represented
by a line with four integer numbers `x_{{ij}}`, `y_{{ij}}`, `x'_{{ij}}`, and `y'_{{ij}}` (`-1000\ ≤\ x_{{ij}},\ y_{{ij}},\ x_{{ij}},\ y_{{ij}}\ ≤\ 1000`) – coordinates
of endpoints. `x_{{ij}}`, `y_{{ij}}` are coordinates of the beginning of `j`-th stroke and `x_{{ij}]`, `y_{{ij}}` are coordinates of the
end of `j`-th stroke. The beginning and the end of the stroke are distinct points. Any two endpoints are
connected by at most one stroke.
Output
Compare the shapes of writings from 2-nd to `n`-th with the shape of the first writing and write to
the output file n – 1 lines with the result of each comparison of a single line. Write CORRECT if the
corresponding writing represents the same shape as the first one or INCORRECT otherwise.
Sample input
9 3 0 0 10 20 10 20 20 0 5 10 15 10 3 0 0 10 20 10 20 20 0 2 10 13 10 3 0 0 10 15 10 15 20 0 5 10 15 10 3 8 10 12 10 0 0 10 20 10 20 14 0 3 0 0 8 20 12 20 20 0 5 10 15 10 3 0 0 10 20 10 20 20 0 0 10 15 10 3 0 0 10 20 10 20 20 0 15 10 5 10 3 2 4 10 20 10 20 20 0 5 10 15 10 4 0 0 10 20 0 0 5 10 10 20 20 0 5 10 15 10
Sample output
CORRECT CORRECT CORRECT INCORRECT INCORRECT INCORRECT INCORRECT INCORRECT
