Orig Description
The Last Line of Defense
In a certain country that was frequently invaded by unidentified creatures, it was decided to protect important facilities with a new defense weapon.
This weapon can damage unidentified creatures by filling a polygonal area with a special gas. If the concentration of the gas changes during the invasion of the unidentified creature, it will cause damage equal to the absolute value of the concentration difference. No damage is caused when the gas concentration is moving in the same area.
With current technology, the concentration of gas can only be constant, so the country decided to deploy multiple new defense weapons. The gas concentration is the same for all weapons, and the parts included in the areas of multiple weapons have their concentrations added together.
Based on the location where the unidentified creature appears and the location of the important facility, please find the minimum damage that the unidentified creature will receive when invading the important facility.
However, it is assumed that the intrusion route of the unidentified creature does not include the vertices of the polygon or the intersection with other polygons. In addition, the unidentified creature does not invade along the edge of the polygon.
Input
The input is given in the following format.
Number of polygonsNumber of polygon verticesx-coordinate y-coordinatex-coordinate y-coordinate...Number of polygon verticesx-coordinate y-coordinatex-coordinate y-coordinate...Number of occurrence points and important facility datax-coordinate of the occurrence position y-coordinate of the occurrence position x-coordinate of the important facility y-coordinate of the important facilityx-coordinate of the occurrence position y-coordinate of the occurrence position x-coordinate of the important facility y-coordinate of the important facility...
Constraints
The coordinates included in the input are integers with absolute values up to 1,000.
The number of polygons is 1 to 5.
The number of polygon vertices is 3 to 5.
The number of data for the occurrence point and important facility is 1 to 100.
A polygon refers to a polygon that can be created by connecting the given vertices in order, and has no self-intersection.
Neither the occurrence point nor the important facility is on the vertex or the edge of the polygon.
Output
Output the minimum damage that the unidentified creature will receive when invading the important facility for each pair of occurrence point and important facility data on a separate line.
Sample Input 1
2
4
0 4
1 1
3 1
4 4
3
6 0
10 0
8 7
1
2 3 9 1
Output for the Sample Input 1
2
One point of damage is inflicted when leaving the first polygon, and another one when entering the second polygon.
Sample Input 2
1
4
0 0
10 0
10 10
0 10
2
15 5 5 5
5 5 15 5
Output for the Sample Input 2
1
1
Damage occurs when the unidentified creature enters the polygon in the first data.
Damage occurs when the unidentified creature leaves the polygon in the second data.
Sample Input 3
2
4
0 0
10 0
10 10
0 10
4
10 0
20 0
20 10
10 10
1
5 5 15 5
Output for the Sample Input 3
0
Since there is no change in concentration when the unidentified creature moves from the first polygon to the second polygon, damage cannot be inflicted.
Sample Input 4
2
3
0 0
10 0
5 10
3
5 0
15 0
10 10
1
5 5 10 5
Output for the Sample Input 4
2
The areas of the occurrence point and important facility contact at a point, but the unidentified creature does not invade through this point.
Sample Input 5
2
4
0 0
10 0
10 10
0 10
4
0 0
10 0
10 10
0 10
2
15 5 5 5
5 5 15 5
Output for the Sample Input 5
2
2
Extracted Specification
An integer P (1 ≤ P ≤ 5), representing the number of polygons.
For each polygon:
An integer V (3 ≤ V ≤ 5), representing the number of vertices.
V pairs of integers, each representing the x and y coordinates of the vertices (−1000 ≤ x, y ≤ 1000).
An integer D (1 ≤ D ≤ 100), representing the number of data points.
For each data point:
Four integers, representing the x and y coordinates of the occurrence position and the x and y coordinates of the important facility (−1000 ≤ x, y ≤ 1000).
### Example Input:
```
2
4
0 4
1 1
3 1
4 4
3
6 0
10 0
8 7
1
2 3 9 1
```
### Function Signature:
```python
def f(P: int, polygons: List[Tuple[int, List[Tuple[int, int]]]], D: int, data: List[Tuple[int, int, int, int]]):
'''
P: an integer
polygons: a list of tuples, each containing an integer V and a list of V pairs of integers representing coordinates
D: an integer
data: a list of tuples, each containing four integers representing coordinates
'''
```
Test Case Generator
Certainly! Generating test cases for a problem like "The Last Line of Defense" involves creating geometrical shapes (polygons), points of intrusions, and facilities. Here’s a Python function to generate such test cases:
```python
import random
def tcgen():
# Number of polygons (1 to 5)
num_polygons = random.randint(1, 5)
# Generate polygons
polygons = []
for _ in range(num_polygons):
# Number of vertices in the polygon (3 to 5)
num_vertices = random.randint(3, 5)
# Generate vertices (x, y) with absolute values up to 1000
vertices = []
for _ in range(num_vertices):
x = random.randint(-1000, 1000)
y = random.randint(-1000, 1000)
vertices.append((x, y))
polygons.append(vertices)
# Number of occurrence points and important facility data (1 to 100)
num_occurrences = random.randint(1, 100)
# Generate occurrence points and facility locations
occurrences = []
for _ in range(num_occurrences):
x1 = random.randint(-1000, 1000)
y1 = random.randint(-1000, 1000)
x2 = random.randint(-1000, 1000)
y2 = random.randint(-1000, 1000)
occurrences.append((x1, y1, x2, y2))
# Format the output similar to the sample input
input_data = []
input_data.append(str(num_polygons))
for polygon in polygons:
input_data.append(str(len(polygon)))
for (x, y) in polygon:
input_data.append(f"{x} {y}")
input_data.append(str(num_occurrences))
for (x1, y1, x2, y2) in occurrences:
input_data.append(f"{x1} {y1} {x2} {y2}")
return '\n'.join(input_data)
# Example usage:
print(tcgen())
```
### Explanation:
1. **Number of Polygons**: Randomly choose between 1 and 5 polygons.
2. **Vertices of Polygons**: Each polygon will have between 3 and 5 vertices. The vertices' coordinates are randomly generated with values between -1000 and 1000.
3. **Occurrences and Facilities**: Generate between 1 and 100 pairs of coordinates representing the occurrence points and the facilities.
This should give a variety of test cases covering different scenarios and edge cases. You can run this `tcgen()` function multiple times to generate different test cases for your problem statement.
Extract Arguments
def extract_arguments(fh):
import itertools
def read_polygon(fh):
num_vertices = int(fh.readline().strip())
vertices = [tuple(map(int, fh.readline().strip().split())) for _ in range(num_vertices)]
return vertices
num_polygons = int(fh.readline().strip())
polygons = [read_polygon(fh) for _ in range(num_polygons)]
num_occurrence_facility_pairs = int(fh.readline().strip())
occurrence_facility_pairs = [
tuple(map(int, fh.readline().strip().split()))
for _ in range(num_occurrence_facility_pairs)
]
return num_polygons, polygons, num_occurrence_facility_pairs, occurrence_facility_pairs
# if __name__ == "__main__":
# input_path = sys.argv[1]
# with open(input_path, 'r') as fh:
# num_polygons, polygons, num_occurrence_facility_pairs, occurrence_facility_pairs = extract_arguments(fh)
# f(num_polygons, polygons, num_occurrence_facility_pairs, occurrence_facility_pairs)