102 lines
2.3 KiB
Python
102 lines
2.3 KiB
Python
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import sys
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sys.path.append("../../")
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import numpy as np
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from collections import deque
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import matplotlib.pyplot as plt
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from util.io import readvalue
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def positive_int(s):
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i = int(s)
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if(not i > 0):
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raise ValueError("{} <= 0".format(i))
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return i
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def float_0_1(s):
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i = float(s)
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if(not i > 0):
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raise ValueError("{} <= 0".format(i))
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if(i > 1):
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raise ValueError("{} > 1".format(i))
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return i
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IS_TREE = 1
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TREE_IS_ON_FIRE = 2
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TREE_WILL_BE_ON_FIRE = 4
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def prepare_model(N, p):
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model = np.zeros((N, N), dtype=np.int8)
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model[np.random.uniform(size=(N,N)) < p] = IS_TREE
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return model
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def index_plus(i, j, add_i, add_j, model):
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new_i = i + add_i
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new_j = j + add_j
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if(new_i >= model.shape[0]):
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new_i -= model.shape[0]
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if(new_i < 0):
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new_i += model.shape[0]
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if(new_j >= model.shape[1]):
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new_j -= model.shape[1]
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if(new_j < 0):
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new_j += model.shape[1]
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return new_i, new_j
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def do_tick(model):
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for i in range(model.shape[0]):
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for j in range(model.shape[1]):
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if((not model[i][j] & IS_TREE) or model[i][j] & TREE_IS_ON_FIRE):
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continue
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if(
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(model[index_plus(i, j, 1, 0, model)] & TREE_IS_ON_FIRE)
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or (model[index_plus(i, j, 0, 1, model)] & TREE_IS_ON_FIRE)
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or (model[index_plus(i, j, -1, 0, model)] & TREE_IS_ON_FIRE)
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or (model[index_plus(i, j, 0, -1, model)] & TREE_IS_ON_FIRE)
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):
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model[i][j] |= TREE_WILL_BE_ON_FIRE
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model[(model & TREE_WILL_BE_ON_FIRE) != 0] |= TREE_IS_ON_FIRE
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model[(model & TREE_WILL_BE_ON_FIRE) != 0] ^= TREE_WILL_BE_ON_FIRE
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def trees_on_fire(model):
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unique, counts = np.unique((model & TREE_IS_ON_FIRE) != 0, return_counts=True)
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if(True not in unique):
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return 0
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return counts[np.where(unique == True)[0]][0]
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def set_initial_on_fire(model):
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i = np.random.randint(0, model.shape[0])
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j = np.random.randint(0, model.shape[1])
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while True:
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if(model[i][j] & IS_TREE):
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model[i][j] |= TREE_IS_ON_FIRE
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break
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i = (i + 1) % model.shape[0]
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j = (j + 1) % model.shape[1]
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N = readvalue("N > ", positive_int)
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p = readvalue("p > ", float_0_1)
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model = prepare_model(N, p)
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set_initial_on_fire(model)
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on_fire = deque()
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last_on_fire = 1
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while True:
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do_tick(model)
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now_on_fire = trees_on_fire(model)
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on_fire.append(now_on_fire)
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if(now_on_fire == last_on_fire):
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break
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last_on_fire = now_on_fire
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plt.plot(*zip(*enumerate(on_fire)))
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plt.show()
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